? Ferruginous Hawk Conservation status: Lower risk
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Aves Order: Falconiformes Family: Accipitridae Genus: Buteo Species: B. regalis
Binomial name
Buteo regalis (Gray, 1844)

The Ferruginous Hawk, Buteo regalis, is a large hawk. Ferruginous Hawk from US BLM Title:Ferruginous hawk in flight Source: U.S. Bureau of Land Management, Snake River Birds of Prey NCA Photo: Larry Ridenhour, BLM File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Subregnum Parazoa Porifera (sponges) Subregnum Agnotozoa Placozoa (trichoplax) Orthonectida (orthonectids) Rhombozoa (rhombozoans) Subregnum Eumetazoa Radiata (unranked) (radial symmetry) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anemones) Bilateria (unranked) (bilateral symmetry) Acoelomorpha (basal) Orthonectida (parasitic to flatworms, echinoderms, etc. ... Typical Classes Subphylum Urochordata - Tunicatas Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders Many - see section below. ... Families Accipitridae Pandionidae Falconidae Sagittariidae The order Falconiformes is a group of about 290 species of birds that include the diurnal birds of prey. ... Subfamilies Elaninae Perninae Milvinae Accipitrinae Buteoninae Aegypiinae Circinae Circaetinae The Accipitridae is one of the two main families within the order Falconiformes (the diurnal birds of prey). ... A buzzard is a type of bird of prey, in any of several different but related senses: A medium-sized wide-ranging raptor with a robust body and broad wings. ... In biology, binomial nomenclature is the formal method of naming species. ... George Robert Gray (July 8, 1808 - May 6, 1872) was an English zoologist and author and head of the ornithological section of the British Museum in London for forty-one years. ... A buzzard is a type of large bird, in any of several different but related senses: In the Old World: A medium-sized wide-ranging raptor with a robust body and broad wings. ...

Adults have long broad wings and a broad grey, rusty or white tail. The legs are feathered to the talons, like the Rough-legged Hawk. There are two colour forms:bootyballs Binomial name Buteo lagopus (Pontopiddan, 1763) The Rough-legged Buzzard (Buteo lagopus), called the Rough-legged Hawk in North America, is a medium-large bird of prey. ...

• Light morph birds are rusty brown on the upper parts and pale on the head, neck and underparts with rust on the legs and some rust marking on the underwing. The upper wings are grey.
• Dark morph birds are dark brown on both upperparts and underparts with light areas on the upper and lower wings.

Their breeding habitat is prairie and open country in mid-western North America. They build a stick nest on top of a tree or cliff edge, sometimes on the ground. Sometimes, cattle dung is used to line nest; historically, buffalo dung was used. Prairie refers to an area of land in North America of low topographic relief that principally supports grasses and herbs, with few trees, and is generally of a mesic (moderate or temperate) climate. ... World map showing North America A satellite composite image of North America. ... Binomial name Bison bison Linnaeus, 1758 Subspecies B. b. ...

In the central part of their range, they are permanent residents. Northern birds migrate to the southern United States and Mexico. // Long-distance land bird migration Many species of land migratory birds migrate very long distances, the most common pattern being for birds to breed in the temperate or arctic northern hemisphere and winter in warmer regions, often in the tropics or the temperate zones of the southern hemisphere. ...

These birds search for prey while flying over open country or from a perch. They may also wait in ambush outside the prey's burrow. They mainly eat small or medium-sized mammals such as jackrabbits and ground squirrels, also snakes and large insects. Species Many, see text Hares and jackrabbits belong to family Leporidae, and mostly in genus Lepus. ... Genera Many, see the article Sciuridae. ...

Studies have found that prairie dogs can be a main prey item for Ferruginous Hawks, linking them to the populations of prairie dog towns in the mid-west and southwestern United States, which have been declining in recent years. Species Cynomys gunnisoni Cynomys leucurus Cynomys ludovicianus Cynomys mexicanus Cynomys parvidens For the newspaper, see Prairie Dog. ...

In flight, these birds soar with their wings in a dihedral. "Ferruginous" refers to the rusty colour of the light morph birds. In geometry, the dihedral is the angle between two planes. ...

This bird's numbers are declining due to loss of habitat. This bird may also be sensitive to the use of pesticides on farms; they are also frequently shot. A cropduster spreading pesticide. ...

Description

The ferruginous hawk is a large, long-winged buteo of the open, arid grasslands and shrub steppe country of the interior parts of North America. Although flexible in choosing a nest site and exhibiting a high reproductive potential, this bird's restriction to natural grasslands on the breeding grounds and specialized predation on mammals persecuted on rangelands may make conservation a continuous concern. It is migratory in the northern parts of its range but can be found year round in the mid and southwest United States. At times it has been considered threatened, endangered, or of concern on various threatened species lists but recent population increases in local areas, coupled with conservation initiatives, have created some optimism about the bird's future. An Inner Mongolian Grassland. ... A steppe in Western Kazakhstan in early spring In physical geography, a steppe (Russian степь or step and pronounced in English as step) is a plain without trees (apart from those near rivers and lakes); it is similar to a prairie, although a prairie is generally considered as being dominated by... An endangered species is a species whose population is so small that it is in danger of becoming extinct. ... Some conservation ecologists have been concerned about the Amazon rainforest. ...

Ferruginous hawk on nest

This is the largest of the buteos and is often mistaken for an eagle due to its size, proportions and behavior. As with all raptors the female is larger than the male, but there is some overlap in the range of measurements for both. Length measurements range from 20 to 26 inches (51 to 66 cm) with an average of 23 inches (58 cm); wingspans from 48 to 60 inches (122 to 152 cm) with an average of 56 inches (142 cm); and weights from 2.2 to 4.5 pounds (998 to 2,041 g).

Image File history File links Ferruginous_hawk_on_nest2. ... Image File history File links Ferruginous_hawk_on_nest2. ...

Identification Tips

The male and female have identical markings. The main difference is size, with the female being larger. Perched birds have a white breast and body with dark legs. The back and wings are a brownish rust color. The head is white with a dark streak extending behind the eye. The wing tips almost reach the tip of the tail. With regard to living things, a body is the integral physical material of an individual, and contrasts with soul, personality and behavior. ... A Laughing Gull on the beach in Atlantic City. ... This article or section does not cite its references or sources. ...

The underside is primarily light colored with the dark legs forming a "V" shape. This is a large hawk with a reddish upper back and inner wing coverts or "shoulders." The primaries are dark gray with conspicuous light "windows" in the inner primaries. Three prominent light areas on the upper surface stand out as two "windows" on the outer wings and a rufous rump mark. The underwings are whitish overall with rufous markings, particularly in the patagial area. This gives a smudgy appearance to the wings but less dark than a red-tailed hawk. Dark "comma" shaped markings are prominent at the wrists. Binomial name Buteo jamaicensis (Gmelin, 1788) The Red-tailed Hawk (Buteo jamaicensis) is a large hawk which breeds from western Alaska and northern Canada to Panama and the West Indies. ... In human anatomy, the wrist is the flexible and narrower connection between the forearm and the hand. ...

Habitat

The preferred habitat for ferruginous hawks is the arid, semiarid and grassland regions of North America. The countryside is open, level, or rolling prairies; foothills or middle elevation plateaus largely devoid of trees; and cultivated shelterbelts or riparian corridors. Rock outcrops, shallow canyons, and gullies may characterize some habitats. These hawks avoid high elevations, forest interiors, narrow canyons, and cliff areas. An Inner Mongolian Grassland. ... For alternate uses of the term, see Plateau (disambiguation). ... A riparian zone schematic from the Everglades. ... Grand Canyon, Arizona A canyon, or gorge, is a valley walled by cliffs. ...

During the breeding season, the preference is for grasslands, sage, and other arid shrub country. Nesting occurs in the open areas or in trees including cottonwoods, willows, and swamp oaks along waterways. Cultivated fields and modified grasslands are avoided during the breeding period. The density of ferruginous hawks in grasslands declines in a direct, inverse relationship to the degree of cultivation of the grasslands. However, high densities have been reported in areas where nearly 80 percent of the grassland was under cultivation. Binomial name Artemisia tridentata Nutt. ... Species Populus deltoides L. Populus fremontii [[]] Populus nigra L. The cottonwoods are three species of poplars in the section Aegiros of the genus Populus, native to North America, Europe and western Asia. ... Species About 350, including: Salix acutifolia- Violet Willow Salix alaxensis- Alaska Willow Salix alba- White Willow Salix alpina- Alpine Willow Salix amygdaloides- Peachleaf Willow Salix arbuscula- Mountain Willow Salix arbusculoides- Littletree Willow Salix arctica- Arctic Willow Salix atrocinerea Salix aurita- Eared Willow Salix babylonica- Peking Willow Salix barrattiana- Barratts... Species See List of Quercus species The term oak can be used as part of the common name of any of several hundred species of trees and shrubs in the genus Quercus, and some related genera, notably Cyclobalanopsis and Lithocarpus. ...

The winter habitat is similar to that used during the summer. However, cultivated areas are not necessarily avoided, particularly when the crops are not ploughed under after harvest. The standing stubble provides habitat for the small mammal prey base needed by ferruginous and other hawks. Some key attributes of the habitat include the availability of perches such as poles, lone trees, knolls, rocky outcrops or large boulders. Nesting will occur in trees if they are available, including riparian strips but the presence of water does not appear to be critical to ferruginous hawks.

Ferruginous hawk chicks on nest

Image File history File linksMetadata Ferruginous_hawk_chicks_on_nest_edited. ... Image File history File linksMetadata Ferruginous_hawk_chicks_on_nest_edited. ...

Range

The ferruginous hawk breeds from southeastern Alberta, southern Saskatchewan and extreme southwestern Manitoba south through eastern Washington, eastern Oregon, and Nevada to Arizona and New Mexico. It's breeding range extends eastward to include Utah, Colorado, Wyoming, Idaho, Montana, the Dakotas and small parts of western Nebraska, Oklahoma and Texas. As such, it has the smallest breeding range of any buteo occurring regularly north of Mexico. Motto: Fortis et Liber (Latin: Strong and free) Official languages English Capital Edmonton Largest city Calgary Lieutenant-Governor Norman Kwong Premier Ralph Klein (PC) Parliamentary representation  - House seat  - Senate seats 28 6 Area Total  â€¢ Land  â€¢ Water    (% of total)  Ranked 6th (provinces and territories) 661,848 km² 642,317 km² 19... Motto: Multis E Gentibus Vires (Latin: From many peoples, strength) Official languages English (but legally required to provide some services in French) Capital Regina Largest city Saskatoon Lieutenant-Governor Lynda M. Haverstock Premier Lorne Calvert (NDP) Parliamentary representation  - House seat  - Senate seats 14 6 Area Total  â€¢ Land  â€¢ Water    (% of total... Motto: Gloriosus et Liber (Latin: Glorious and free) Official languages English (French is an official language of the Manitoban legislature and courts) Capital Winnipeg Largest city Winnipeg Lieutenant-Governor John Harvard Premier Gary Doer (NDP) Parliamentary representation  - House seat  - Senate seats 14 6 Area Total  â€¢ Land  â€¢ Water    (% of total)  Ranked... Official language(s) None Capital Olympia Largest city Seattle Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 18th 184,824 km² 385 km 580 km 6. ... Official language(s) None Capital Salem Largest city Portland Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 9th 255,026 km² 420 km 580 km 2. ... Official language(s) None Capital Carson City Largest city Las Vegas Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 7th 286,367 km² 519 km 788 km 0. ... Official language(s) None Capital Phoenix Largest city Phoenix Area  - Total   - Width   - Length    - % water  - Latitude  - Longitude Ranked 6th 113,998 sq mi  295,254 km² 310 miles  500 km 400 miles  645 km 0. ... Official language(s) None; English and Spanish de facto Capital Santa Fe Largest city Albuquerque Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 5th 315,194 km² 550 km 595 km 0. ... Official language(s) English Capital Salt Lake City Largest city Salt Lake City Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 13th 219,887 km² 435 km 565 km 3. ... Official language(s) English Capital Denver Largest city Denver Area  - Total   - Width   - Length    - % water  - Latitude  - Longitude Ranked 8th 104,185 sq mi  269 837 km² 280 miles  451 km 380 miles  612 km 0. ... Official language(s) English Capital Cheyenne Largest city Cheyenne Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 10th 253,554 km² 450 km 580 km 0. ... Official language(s) None Capital Boise Largest city Boise Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 14th 216,632 km² 491 km 771 km 0. ... Official language(s) English Capital Helena Largest city Billings Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 4th 381,156 km² 410 km 1,015 km 1 44°26 N to 49° N 104°2 W to 116°2 W Population  - Total (2000)  - Density Ranked 44th 1,087,340 2. ... Official language(s) English Capital Lincoln Largest city Omaha Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 16th 200,520 km² 340 km 690 km 0. ... Template:ROXANA This article is about the U.S. State. ... Official language(s) None. ...

The wintering range includes the breeding range north only to the latitudes of northern Wyoming, but it expands west in Oregon and includes California, south into Mexico and eastward in South Dakota, Nebraska, Kansas, Oklahoma and Texas. Year-round, the ferruginous hawk can be found within the breeding range except for the Canadian provinces, Washington, northern Oregon, Montana, North Dakota and northern South Dakota and northern Wyoming. Stragglers in migration and winter have occurred in Ohio, Tennessee, Virginia, New Jersey, Minnesota, Wisconsin, and Florida. There are no subspecies and this species occurs nowhere in the world except in North America. Official language(s) English Capital Tallahassee Largest city Jacksonville Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 22nd 170,451 km² 260 km 800 km 17. ... In zoology, as in other branches of biology, subspecies is the rank immediately subordinate to a species. ... In biology, a species is the basic unit of biodiversity. ...

Behavior

The flight of the ferruginous hawk is active, with slow wing beats much like that of a small eagle. Soaring with the wings held in a strong dihedral has been noted, as well as gliding with the wings held flat, or in a modified dihedral. Hovering and low cruising over the ground are also used as hunting techniques. The wing beat has been described as "fluid" by some observers.

Hunting may occur at any time of the day depending upon the activity patterns of the major prey species. A bimodal pattern of early morning and late afternoon hunting may be common. The hunting tactics can be grouped into seven basic strategies:

• Perch and Wait - perching is on any elevated natural or man-made site

• Ground Perching - the hawk will stand on the ground at a rodent burrow after initially locating it from the air. As the burrowing animal reaches the surface, the hawk rises into the air and pounces upon it even while it is still underneath the loose earth.

• Low-level Flight - birds will course over the landscape within a few yards of the ground and pursue in direct, low level chases, or they will hunt from 40 to 60 feet (12.4 to 18.6 m) above the ground.

• High-level Flight - birds will hunt while soaring, but the success rate is generally low.

• Hovering - using quickened wing beats, often in times of increased winds, the birds will search the ground and drop on the prey.

• Cooperative Hunting - mates have been known to assist each other.

• Piracy - the ferruginous hawk has been observed gathering around a hunter shooting prairie dogs, and to claim shot "dogs" by flying to them and mantling over them.

Banding Ferruginous hawk chicks

In the strike, kill, and consumption type of predation, the victims are seized with the feet and a series of blows may be meted out, including driving the rear talon into the body to puncture vital organs. Biting with the beak may also take place. Before bringing prey to the nest, the adults will often eat the head. At the nest, birds are plucked and mammals torn into pieces before being fed to the young. Food caching has been noted, but not generally near the nest. Wind is the roughly horizontal movement of air (as opposed to an air current) caused by uneven heating of the Earths surface. ... Trinomial name Canis lupus familiaris (Linnaeus, 1758) This article is about the domestic dog. ... Image File history File linksMetadata Banding_Ferruginous_hawk_chicks. ... Image File history File linksMetadata Banding_Ferruginous_hawk_chicks. ... Talon may refer to several different things: Talon, Nièvre, a commune in the Nièvre département, in France the claw of a bird of prey a fictional class of Romulan starship in Star Trek the Eagle Talon, an automobile produced by the Eagle division of Chrysler a fictional... The beak - otherwise known as the bill or rostrum - is an external anatomical structure which serves as the mouth in some animals. ... Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Eutheria (includes extinct ancestors)/Placentalia (excludes extinct ancestors) Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes...

The ferruginous hawk maintains minimum distances from other nesting raptors but will nest closer than necessary, suggesting that the distance is not fixed. The "nearest neighbor" distance has varied from less than 1 mile (1.6 km) to as much as 4 miles (6.4 km) with an average of 2 miles (3.2 km). Nests facing different hunting territories are tolerated much closer than nests facing the same hunting territory. The minimum distance between nests is probably about one half mile on densely-occupied areas. Territorial conflicts have been reported with other species, such as the great horned and short-eared owl, Northern harrier, red-tailed and Swainson's hawk, golden eagle, accipiters, ravens, and magpies. It seems to be quite tolerant of other ferruginous hawks from adjacent territories. Binomial name Asio flammeus (Pontopiddan, 1763) The Short-eared Owl Asio flammeus is a species of owl which breed in Europe, Asia, North and South America, the Caribbean, Hawaii and the Galapagos. ... Binomial name Circus cyaneus (Linnaeus, 1766) The Hen Harrier (Circus cyaneus) is a bird of prey of the harrier family. ... Binomial name Buteo swainsoni Bonaparte, 1838 The Swainsons Hawk, Buteo swainsoni, is a large hawk. ... Binomial name Aquila chrysaetos Linnaeus, 1758 The Golden Eagle (Aquila chrysaetos) is one of the best known birds of prey in the Northern Hemisphere. ... The genus Accipiter is a group of birds of prey in the family Accipitridae. ... Species See text Many large black birds of the genus Corvus are called ravens. ... Genera Pica Urocissa Cyanopica Cissa The magpies are medium to large, often colorful and noisy passerine birds in the crow family, Corvidae. ...

Nesting densities in several studies have varied from one pair per four to 2,450 square miles (10.4 to 6,346 square km). In Alberta, on one study site, there was a stable density of one pair per four square miles (10.4 square km), on average with little deviation from this mean. In Idaho, the average home range for four pairs of ferruginous hawks in the Snake River area was slightly over two square miles (5.2 square km).

Nesting

The ferruginous hawk is one of the most adaptable nesters of all of the raptors, and will use trees, ledges, rock or dirt outcrops, the ground, haystacks, nest platforms, power poles, and other man-made structures. Within some broad categories such as cliffs, the variety includes clay, dirt and rock substrates. Tree nests are typically in isolated trees or isolated clumps of trees in exposed locations. Authors differ as to whether ground nests are more successful than tree nests, but they are more susceptible to mammalian predation. Nest locations are reused frequently, but several nests may be built in an area. Typically, one or two alternate nests may exist but up to eight have been found on some territories. For other uses, see Tree (disambiguation). ... Sedimentary, volcanic, plutonic, metamorphic rock types of North America. ... The word ground has several meanings: The surface of the Earth Soil, a mixture of sand and organic material present on the surface of the Earth Ground (electricity), in electrical engineering, something that is connected to the Earth or at the voltage defined as zero (in the US, called ground... Haystacks, or Hay Stacks, is a mountain in Englands Lake District, situated at the south-eastern end of the Buttermere Valley. ...

Ferruginous hawk nesting platform

The nests are made of ground debris such as sticks, branches, and cattails. Old nests will be refurbished, or nests of other species may be taken over and refurbished with sticks being added on top of the old nests. Odd items such as paper, rubbish, barbed wire, cornstalks, plastic and steel cable have been incorporated into nests. Bark from trees and shrubs will be used for lining along with grasses and cow dung. Bits and pieces of greenery are often added to the nest. Both sexes are involved with building the nests and bringing materials, but the male seems to be more involved in retrieving materials while the female arranges them in the structure. Image File history File linksMetadata Ferruginous_hawk_nesting_platform. ... Image File history File linksMetadata Ferruginous_hawk_nesting_platform. ... Modern barbed wire Barbed wire is a type of fencing wire constructed with sharp edges or points arranged at intervals along the strand(s). ... Plastic covers a range of synthetic or semisynthetic polymerization products. ... The old steel cable of a colliery winding tower Steel is a metal alloy whose major component is iron, with carbon being the primary alloying material. ...

Food/Diet

The ferruginous hawk primarily hunts small to medium-sized mammals but will also take birds, reptiles, and some insects. Mammals generally comprise 80 to 90 percent of the prey items or biomass in the diet with birds being the next most common component. The diet varies somewhat geographically, depending upon the distribution of certain prey species, but where the range of the ferruginous hawk overlaps, the black-tailed jackrabbit is a major food species along with ground squirrels and pocket gophers. Depending upon the relative abundance of jackrabbits and ground squirrels, the latter could become the major food source. The particular species is dependent upon its occurrence within the range of the hawk. Orders See text. ... Orders Subclass Apterygota Symphypleona - globular springtails Subclass Archaeognatha (jumping bristletails) Subclass Dicondylia Monura - extinct Thysanura (common bristletails) Subclass Pterygota Diaphanopteroidea - extinct Palaeodictyoptera - extinct Megasecoptera - extinct Archodonata - extinct Ephemeroptera (mayflies) Odonata (dragonflies and damselflies) Infraclass Neoptera Blattodea (cockroaches) Mantodea (mantids) Isoptera (termites) Zoraptera Grylloblattodea Dermaptera (earwigs) Plecoptera (stoneflies) Orthoptera (grasshoppers, crickets... Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Eutheria (includes extinct ancestors)/Placentalia (excludes extinct ancestors) Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes... Genera Many, see the article Sciuridae. ...

In the following list, some generic references to mammals such as jackrabbits and ground squirrels are used, but include a number of species within those groups. The particular species taken by ferruginous hawks depends upon range overlap and subsequent availability. Common prey items are jackrabbits (black-tailed, white-tailed), cottontails, ground squirrels (Richardson's, 13-lined, antelope), prairie dog, Species Cynomys gunnisoni Cynomys leucurus Cynomys ludovicianus Cynomys mexicanus Cynomys parvidens Prairie dogs are small stout-bodied burrowing rodents with shallow cheek pouches native to both North and Central America. ...

Prairie dogs, one of the favorite foods of the Ferruginous hawk

kangaroo rats (Ord's), northern pocket gopher, voles (various species), mice (white-footed and others), long-tailed weasel, snowshoe hare, muskrat, pocket mice, horned lark, western meadowlark, sharp-tailed grouse, ring-necked pheasant, gray partridge, chukar, ducks, Northern harrier, short-eared owl, burrowing owl, long-billed curlew, black-billed magpie, bull snake, yellow-bellied racer, garter snake,grasshoppers, crickets, carabid beetles, and a few other larger insects. Prarie Dog This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Prarie Dog This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Species 21, see text Kangaroo rats, genus Dipodomys, are small rodents native to North and Central America. ... Genera Microtus Myodes Phenacomys Lagurus Arvicola A vole is a small rodent resembling a mouse but with a stouter body; a shorter, hairy tail; and smaller ears and eyes. ... Mice may refer to: Plural of the word mouse An indie band set up in 1995 by All About Eves Julianne Regan. ... Species Many; see article. ... Families Superfamily: Tridactyloidea Cylindrachaetidae Ripipterygidae Tridactylidae Superfamily: Tetrigoidea Tetrigidae Superfamily: Eumastacoidea Chorotypidae Episactidae Eumastacidae Euschmidtiidae Mastacideidae Morabidae Proscopiidae Thericleidae Superfamily: Pneumoroidea Pneumoridae Superfamily: Pyrgomorphoidea Pyrgomorphidae Superfamily: Acridoidea Acrididae Charilaidae Dericorythidae Lathiceridae Lentulidae Lithidiidae Ommexechidae Pamphagidae Pyrgacrididae Romaleidae Tristiridae Superfamily: Tanaoceroidea Tanaoceridae Superfamily: Trigonopterygoidea Trigonopterygidae Xyronotidae Grasshoppers are herbivorous insects of... For the insect, see Cricket (insect). ...

Voice

The voice is not well-described in literature. Alarm calls consist of "kree - a" or "ke - ah" and harsh "kaah, kaah" calls. The latter resembling some vocalizations of the herring gull. One description referred to the "wavering" alarm call and "breathy" notes while other authors describe screams similar to those of the red-tailed hawk. To meet Wikipedias quality standards, this article or section may require cleanup. ... Literature is literally acquaintance with letters as in the first sense given in the Oxford English Dictionary (from the Latin littera meaning an individual written character (letter)). The term has generally come to identify a collection of texts, which in Western culture are mainly prose, both fiction and non-fiction... Binomial name Larus argentatus Pontopiddan, 1763 The herring gull, Larus argentatus, is a large gull which breeds across North America, Europe and Asia. ... Binomial name Buteo jamaicensis (Gmelin, 1788) The Red-tailed Hawk (Buteo jamaicensis) is a large hawk which breeds from western Alaska and northern Canada to Panama and the West Indies. ...

Reproduction/Life Span

Copulation occurs during and after nest building. The egg-laying period varies with latitude, weather, and possibly food supply. In the Canadian parts of the range, laying occurs during the latter part of April through late June, whereas farther south laying starts from about March 20 through mid May. The earliest recorded clutch was in January in Utah and laying could occur as late as July 3 in Canada. Egg-laying occurs at two-day intervals with incubation starting when the first egg is laid. Incubation is shared by both sexes with each taking approximately the same number of shifts during the 32 day average incubation period. Replacement clutches following failure appears to be rare. An average Whooping Crane egg is 102 mm long, and weighs 208 grams In some animals, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. ... Latitude, usually denoted symbolically by the Greek letter φ, gives the location of a place on Earth north or south of the Equator. ... Find more information on Weather by searching Wikipedias sister projects: Dictionary definitions from Wiktionary Textbooks from Wikibooks Quotations from Wikiquote Source texts from Wikisource Images and media from Commons News stories from Wikinews Weather is an all-encompassing term used to describe all of the many and varied phenomena... July 3 is the 184th day of the year (185th in leap years) in the Gregorian calendar, with 181 days remaining. ... The word incubation (from the Latin incubare, to lie upon) can mean the following: In chemistry or biochemistry, incubation refers to maintaining a system under specific conditions in order to promote a particular reaction. ...

Courtship flights seem to be limited in the accepted sense. Both sexes engage in high, circling flight but literature details are sketchy. Soaring activities may primarily be variations on territorial defense flights as opposed to courtship per se. The "flutter - glide" flight consists of a series of shallow, rapid wing beats interspersed with brief glides and may serve to advertise the territory. The "sky-dance" is stimulated by an intruder and consists of slow flight with deep, labored wing beats with irregular yawing and pitching that may terminate in steep dives. In the "follow-soar" maneuver, the male ferruginous hawk will fly below an intruder and escort it out of the territory.

High perching occurs from prominent places around the nest, particularly early in the breeding cycle. Aggressive actions such as attacking, talon-grasping, and pursuit have been noted by some observers. Copulation begins before construction of the new nest, and increases in frequency until the start of egg laying. The passing of food may occur before the activity. The duration of copulation is from four to 18 seconds.

Juvenile Ferruginous hawk

Clutch size varies from one to eight and is likely linked to food supply. The average clutch is three to four eggs, each 2.5 inches (6.35 cm) long and 2 inches (5.08 cm) wide. They are smooth, non-glossy and whitish in color, irregularly spotted or speckled and blotched with reddish - brown markings. There may be a concentration of darker pigments at the small end of the egg. Occasionally, the eggs are almost unmarked or have faint scribblings on them. Image File history File linksMetadata Juvenile_Ferruginous_hawk. ... Image File history File linksMetadata Juvenile_Ferruginous_hawk. ...

The nestling period varies from 38 to 50 days with brooding primarily by the female. Males fledge at 38 to 40 days and the females as late as 50 days after hatching, or 10 days later than their male siblings as they take longer to develop. Nestlings lie or sit for the first two weeks, stand at about three weeks and walk soon after. By 16 or 18 days, they are able to feed on their own. Wing flapping starts about day 23 and by day 33 the young are capable of vigorous flapping and "flap jumps." The nestlings are sensitive to high temperatures and seek shade however possible in the nest. Temperature is also the name of a song by Sean Paul. ...

Initial movement out of the nest is felt to be a response to heat stress as the young quickly move towards shade. The initial flight for the males is taken at 38 to 40 days while the slower-developing females fly about 10 days later. Post-fledging dependency upon the parents may last for several weeks. During the first four weeks after fledging, the young patrol increasingly large areas around the nest as they learn to hunt. Young hawks have killed prey as early as four days after fledging.

The ferruginous hawk is single-brooded and like so many raptors, the number of young reared is tied closely to food supply. In areas where jackrabbit populations are the principal food source, the initial clutch sizes and the number of reared young vary closely with variations in the number of jackrabbits. Fifty percent loss of young has been reported in low jackrabbit years. Fledging rates of 2.7 to 3.6 young per nest have been reported during years of abundant food supply. The high potential clutch size allows for a quick response to increases in the prey base.

Birds have been known to live for 20 years in the wild, but most birds probably die within the first five years. The oldest banded birds were recovered at age 20. First year mortality has been estimated at 66 percent and the adult mortality at 25 percent. The reasons for mortality include illegal shooting, loss of a satisfactory food supply, harassment, predation, and starvation of nestlings during times of low food supply. Ground nests are susceptible to predation by coyotes, and nestlings may be preyed upon by great horned owls and golden eagles. Starvation is a severe reduction in vitamin, nutrient, and energy intake, and is the most extreme form of malnutrition. ... {{Taxobox - | color = pink - | name = Great Horned Owl - | image = Bubo virginianus1. ... Binomial name Aquila chrysaetos Linnaeus, 1758 The Golden Eagle (Aquila chrysaetos) is one of the best known birds of prey in the Northern Hemisphere. ...

Conservation

The ferruginous hawk was on the National Audubon Society's "Blue List" of species felt to be declining. From 1971 to 1981 it retained its "blue" status, and from 1982 to 1986 it was listed as a species of "Special Concern." The United States Fish and Wildlife Service placed it in a category of "undetermined" in 1973, and various states have placed it in categories of "Threatened" or "Endangered." In Canada, the Committee on the Status of Endangered Wildlife in Canada considered this species "Threatened" in 1980. Headquarter of National Audubon Society in New York. ... 1971 (MCMLXXI) was a common year starting on Friday (the link is to a full 1971 calendar). ... 1981 (MCMLXXXI) was a common year starting on Thursday of the Gregorian calendar. ... 1982 (MCMLXXXII) was a common year starting on Friday of the Gregorian calendar. ... 1986 (MCMLXXXVI) was a common year starting on Wednesday of the Gregorian calendar. ... 1973 (MCMLXXIII) was a common year starting on Monday. ... 1980 (MCMLXXX) was a leap year starting on Tuesday. ...

Across the Canadian prairies, the range was diminishing up until 1980, and at that time, birds were felt to be occupying 48 percent of its original range. Numbers were generally felt to be diminishing and a total Canadian population was estimated at 500 to 1000 pairs. By 1987, population increases were being noted, and the Alberta population alone was estimated at 1,800 pairs. The upswing was likely due to a greater availability of food on the wintering grounds, making the birds more likely to breed when they returned to Canada. In the United States, there has been a history of concern for this species in many states with declines noted, but in 1988, one study suggested that the population in California and locally elsewhere may have increased significantly. The wintering population north of Mexico was estimated at 5,500 birds in 1986. In 1984, the population estimate for North America was between 3,000 and 4,000 pairs, and in 1987, it was 14,000 individuals. 1987 (MCMLXXXVII) was a common year starting on Thursday of the Gregorian calendar. ... 1984 (MCMLXXXIV) was a leap year starting on Sunday of the Gregorian calendar. ...

Threats to the overall population include:

• cultivation of native prairie grassland and subsequent habitat loss

• tree invasion of northern grassland habitats

• reductions in food supply due to agricultural pest management programs

• shooting and human interference

Toxic chemicals have not been suggested as a significant threat to the ferruginous hawk. Management strategies must include the retention or reclamation of native grasslands for breeding as well as on the wintering grounds. Maintenance of high populations of prey species in wintering areas seems critical to the hawks' abilities to move onto the summer range in breeding condition. The integration of agricultural practices and policies into the management strategies is a crucial component of any overall scheme for conservation. The provision of nesting platforms has had positive effects and should be a part of local strategies. Public education and the elimination of persecution and human disturbance must be an important part of the overall conservation program. A chemical substance is any material substance used in or obtained by a process in chemistry: A chemical compound is a substance consisting of two or more chemical elements that are chemically combined in fixed proportions. ...

Observing Ferruginous hawks

Snake River Birds of Prey National Conservation Area

One of the best places to view the hawk is in the Snake River Birds of Prey National Conservation Area (NCA) in Idaho. Birds in the NCA are not on display. They follow the rhythms of nature and not the desires of people who come to see them. Your chance of seeing the hawks will improve if you follow these tips: Image File history File links Id_SnakeRiver_LarryRidenhour_BLM_350. ... Image File history File links Id_SnakeRiver_LarryRidenhour_BLM_350. ... Snake River Birds of Prey National Conservation Area The Snake River Birds of Prey National Conservation Area is home to the largest concentration of nesting raptors in North America. ...

• Bring a good pair of binoculars. Field guides or spotting scopes are also helpful.

• Viewing tends to be best in mid-March, May and June, in the early morning and evening hours when the hawks are actively hunting.

• During April, viewing opportunities slow as birds spend most of their time sitting on nests.

• By July, the canyon temperatures are fiercely hot, ground squirrels have gone back underground and many hawks have left the area.

• Wildlife are wary of humans. Patience is a wildlife watcher's best virtue. When an animal changes behavior as a result of your presence, you are too close.

References

• Part of this article incorporates text from the Bureau of Land Management, which is in the public domain.
• Cartron JLE, Polechla PJ, Cook RR. (2004). "Prey of nesting ferruginous hawks in New Mexico". SOUTHWESTERN NATURALIST 49 (2): 270-276 JUN