? Aegolius
Tengmalm's Owl
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Aves Order: Strigiformes Family: Strigidae Genus: Aegolius Kaup, 1829
Species
A. funereus A. acadicus A. ridgwayi A. harrisii

Aegolius is a small genus of owls. Three of the species are restricted to the New World, but Tengmalm's Owl (Boreal Owl) has a circumpolar range through North America, Eurasia, the Alps and the Rockies. Image File history File links Download high resolution version (512x768, 272 KB)Boreal Owl -- Amherst Island (Ontario, Canada) -- 2005 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). ... Binomial name Aptenodytes forsteri Gray, 1844 For other uses, see Animal (disambiguation). ... 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 Strigidae Tytonidae An owl is a member of any of some 220+ (222 currently known) species of solitary, mainly nocturnal birds of prey in the order Strigiformes. ... Genera Aegolius: saw-whet owls Asio: eared owls Athene Bubo: horned owls Ciccaba Glaucidium: pygmy owls Jubula Lophostrix Micrathene: elf owls Mimizuku Nesasio Ninox Otus: scops owls Pseudoscops Pulsatrix Pyrroglaux: palau owls Sceloglaux Scotopelia Speotyto Strix: earless owls Surnia: hawk owls Uroglaux Xenoglaux Typical owls (family Strigidae) are one of... Johann Jakob Kaup (April 10, 1803 - July 4, 1873) was a German naturalist. ... Genera Aegolius: saw-whet owls Asio: eared owls Athene Bubo: horned owls Ciccaba Glaucidium: pygmy owls Jubula Lophostrix Micrathene: elf owls Mimizuku Nesasio Ninox Otus: scops owls Pseudoscops Pulsatrix Pyrroglaux: palau owls Sceloglaux Scotopelia Speotyto Strix: earless owls Surnia: hawk owls Uroglaux Xenoglaux Typical owls (family Strigidae) are one of... Carte dAmérique, Guillaume Delisle, c. ... World map showing North America A satellite composite image of North America. ... Eurasia African-Eurasian aspect of Earth Eurasia is the landmass composed of Europe and Asia. ... The West face of the Petit Dru above the Chamonix valley near the Mer de Glace. ... White Goat Wilderness Area, Alberta, Canada The Rocky Mountains, often called the Rockies, are a broad mountain range in western North America. ...

The species are:

• Tengmalm's Owl or Boreal Owl, Aegolius funereus
• Northern Saw-whet Owl, Aegolius acadicus
• Unspotted Saw-whet Owl, Aegolius ridgwayi
• Buff-fronted Owl, Aegolius harrisii

These are essentially nocturnal woodland owls of temperate or colder climates; the two northern species breed in North America’s coniferous forests, and the Unspotted Saw-whet Owl and Buff-fronted Owl (Central and South America respectively) are species of mountain cloud or oak forests. Binomial name Aegolius funereus (Linnaeus, 1758) The Tengmalms Owl, Aegolius funereus, is a small owl. ... Binomial name Aegolius acadicus (Gmelin, 1788) The Northern Saw-whet Owl (Aegolius acadicus) is a small owl. ... Orders & Families Cordaitales † Pinales   Pinaceae - Pine family   Araucariaceae - Araucaria family   Podocarpaceae - Yellow-wood family   Sciadopityaceae - Umbrella-pine family   Cupressaceae - Cypress family   Cephalotaxaceae - Plum-yew family   Taxaceae - Yew family Vojnovskyales † Voltziales † The conifers, division Pinophyta, are one of 13 or 14 division level taxa within the Kingdom Plantae. ... Map of Central America Central America is an area of the American continent in the Western Hemisphere. ... South America South America is a continent crossed by the equator, with most of its area in the Southern Hemisphere. ...

These are mainly resident birds, but the northern species at least will sometimes move south or to lower altitudes in autumn. The movements are difficult to monitor due to the problems of detecting these nocturnal owls outside the breeding season when they are not calling. // Long-distance land bird migration Many species of land 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 southern hemisphere. ...

Aegolius owls are small, dumpy, short tailed and broad winged, with large round facial discs. The species varies from 18-27 cm in length.

These owls take mainly rodents and other small mammals as their prey, but will also feed on birds, bats, insects and other invertebrates according to what is available. Families See Classification Section The order Rodentia is the most numerous of all the branches on the mammal family tree. ... 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... Orders Many - see section below. ... Suborders Megachiroptera Microchiroptera See text for families. ... Classes & Orders See taxonomy Insects are invertebrate animals of the Class Insecta, the largest and (on land) most widely-distributed taxon within the phylum Arthropoda. ...

The Aegolius owls are dark brown or black above, and whitish or buff below, marked with streaks or spots in the two northern forms. The head is large, with yellow eyes and a well-defined facial disc. The flight is strong, agile and direct.

Aegolius owls breed in tree holes laying several eggs. They have repetitive whistling calls in the breeding season.

References

• Stiles and Skutch A guide to the birds of Costa Rica ISBN 0-0814-9600-4
• Hilty Birds of Venezuela ISBN 0-7136-6418-5
• National Geographic Field Guide to the Birds of North America ISBN 0792268776
• Mullarney, Svensson, Zetterstrom and Grant Collins Bird Guide ISBN 0-00-219728-6