?Douglas Squirrel Conservation status: Least concern (LR/lc)
Tamiasciurus douglasii (Oregon coast)
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Rodentia Family: Sciuridae Genus: Tamiasciurus Species: T. douglasii
Binomial name
Tamiasciurus douglasii (Bachman, 1839)

Desolation Wilderness (Sierra Nevada)

The Douglas Squirrel, Tamiasciurus douglasii, is a pine squirrel found in the Pacific coastal states and provinces of North America. It is sometimes known as the Chickaree or Pine Squirrel, but since Chickaree is also used for the American Red Squirrel and Pine Squirrel for the genus Tamiasciurus, these alternative names are better avoided. The Native Americans of Kings River called it the "Pillillooeet", in imitation of its characteristic alarm call . The conservation status of a species is an indicator of the likelihood of that species continuing to survive. ... Image File history File linksMetadata Tamiasciurus_douglasii_000. ... Official language(s) None Capital Salem Largest city Portland Area  Ranked 9th  - Total 98,466 sq mi (255,026 km²)  - Width 260 miles (420 km)  - Length 360 miles (580 km)  - % water 2. ... 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 (dicyemids) Subregnum Eumetazoa Radiata (unranked) (radial symmetry) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anemones) Bilateria (unranked) (bilateral symmetry) Acoelomorpha (basal) Myxozoa (slime animals) Superphylum Deuterostomia (blastopore becomes anus) Chordata (vertebrates, 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 Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Australosphenida Ausktribosphenida Monotremata Subclass Eutheria (excludes extinct ancestors) Afrosoricida Anagaloidea (extinct) Arctostylopida (extinct) Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Dinocerata (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia... Families Many, see text The order Rodentia is the most numerous of all the branches on the mammal family tree. ... Genera Many: see text. ... Species Tamiasciurus douglasii Tamiasciurus hudsonicus Pine squirrels are squirrels of the genus Tamiasciurus. ... In biology, binomial nomenclature is the formal method of naming species. ... Rev. ... 1839 was a common year starting on Tuesday (see link for calendar). ... Image File history File linksMetadata Download high-resolution version (164x823, 38 KB) Source en:Image:DouglasSquirrels. ... Image File history File linksMetadata Download high-resolution version (164x823, 38 KB) Source en:Image:DouglasSquirrels. ... The Desolation Wilderness is a 63,690 acre (258 km²) wilderness area located along the crest of the Sierra Nevada mountain range, just west of Lake Tahoe in California, United States. ... The Sierra Nevada is a mountain range that is almost entirely in eastern California. ... Species Tamiasciurus douglasii Tamiasciurus hudsonicus Pine squirrels are squirrels of the genus Tamiasciurus. ... World map showing North America A satellite composite image of North America. ... Binomial name Tamiasciurus hudsonicus (Erxleben, 1777) The North American red squirrel (Tamiasciurus hudsonicus) is a medium sized (200–250g) diurnal mammal that defends a year-round exclusive territory. ... American Indian and Alaskan Natives[1] (term preferred by the majority of people included) are the indigenous peoples within the territory that is now encompassed by the continental United States, including parts of Alaska down to their descendants in modern times. ... The Kings River is a major river of California, USA. It arises in the Sierra Nevada, in three forks. ... In biology, alarm call refers to various vocalizations by animals in response to danger. ...

John Muir described the Douglas Squirrel as "by far the most interesting and influential of the California sciuridæ". It is a small, lively, bush-tailed tree squirrel, enchanting to watch. Adults are about 33 cm in length (including its tail, which is about 13 cm long), and weigh between 150 and 300 grams. Their appearance varies according to the season. In the summer, they are a grayish or almost greenish brown on their backs, and pale orange on the chest and belly, while legs and feet appear brown. In the winter, the coat is browner and the underside is grayer; also, the ears appear even tuftier than they do in summer. Like many squirrels, Douglas Squirrels have a white eye ring. John Muir (1838-1914) John Muir (April 21, 1838 – December 24, 1914) was one of the earliest, and perhaps the most important of, modern conservationists. ... Genera Many: see text. ...

Douglas Squirrels live in coniferous forests, from the Sierra Nevada mountains of California northwards to coastal British Columbia. They prefer old-growth or mature second-growth forest, and some authors regard them as dependent on its presence. They are active by day, throughout the year, often chattering noisily at intruders. In summer nights, they sleep in ball-shaped nests that they make in the trees, but in the winter they use holes in trees as nests. They are territorial; in winter, each squirrel occupies a territory of about 10,000 square metres, but during the breeding season a mated pair will defend a single territory together. Groups of squirrels seen together during the summer are likely to be juveniles from a single litter. 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. ... The Sierra Nevada is a mountain range that is almost entirely in eastern California. ... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ... Motto: Splendor Sine Occasu (Latin: Splendour without diminishment) Official languages none stated in law; English is de facto Flower Pacific dogwood Tree Western Redcedar Bird Stellers Jay Capital Victoria Largest city Vancouver Lieutenant-Governor Iona Campagnolo Premier Gordon Campbell (BC Liberal) Parliamentary representation  - House seat  - Senate seats 36 6...

Douglas squirrels mostly eat seeds of coniferous trees such as Douglas Fir, Sitka Spruce and Shore Pine, though they do also eat acorns, berries, mushrooms, the eggs of birds such as Yellow Warblers, and some fruit. Unlike many other types of tree squirrel, they lack cheek pouches in which to hold food. They are scatter hoarders, burying pine cones (which they cut from the trees while green) during the autumn. They often use a single place, called a midden, for peeling the scales off cones to get at the seeds, and the scales may accumulate for years, the same site being used by generations of squirrels. Their predators include American Martens, Bobcats, cats, Northern Goshawks, and owls; although they quickly acclimatise to human presence, humans can be a threat to them, through robbing of their cone caches to find seeds for tree cultivation and through the destruction of old growth forest. However, the squirrels' numbers appear to be unaffected by commercial thinning of forests. Species See text. ... Binomial name Picea sitchensis (Bong. ... Binomial name Pinus contorta Douglas Lodgepole Pine (Pinus contorta) is a common tree in western North America. ... Binomial name Dendroica petechia (Linnaeus,, 1766) The Yellow Warbler, Dendroica petechia, is a New World warbler. ... Binomial name Martes americana (Turton, 1806) The American Marten, Martes americana, is a North American marten sometimes also called the Pine Marten, even though it is a separate species from the European Pine Marten. ... Binomial name Lynx rufus (Schreber, 1777) The Bobcat (Lynx rufus, commonly misinterpreted as Felis rufus) is a small wild cat indigenous to North America. ... Trinomial name Felis silvestris catus Schreber, 1775 For alternative meanings see cat (disambiguation). ... Binomial name Accipiter gentilis (Linnaeus, 1758) The Goshawk (Accipiter gentilis; from OE. góshafuc goose-hawk) is a medium large bird of prey in the family Accipitridae which also includes many other diurnal raptors such as eagles, buzzards and harriers. ... Families Strigidae Tytonidae An owl is a member of any of about 220 (222 currently known) species of solitary, mainly nocturnal birds of prey in the order Strigiformes. ...

Wenatchee National Forest (Cascade Range)

Mating can occur as early as February. Gestation is about four weeks, and the young (which are altricial) are weaned at about eight weeks of age. There may be up to six kits in a litter, though four is more usual. In the southern and lower parts of their range they produce two litters each year. Image File history File links Download high-resolution version (775x620, 226 KB) Summary Douglas Squirrel Description: Douglas Squirrel (Tamiasciurus douglasii) on alder in a Douglas-fir forest with Vine Maple understory. ... Image File history File links Download high-resolution version (775x620, 226 KB) Summary Douglas Squirrel Description: Douglas Squirrel (Tamiasciurus douglasii) on alder in a Douglas-fir forest with Vine Maple understory. ... Wenatchee National Forest is a U.S. National Forest located in Washington. ... Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia through Washington and Oregon to the Shasta Cascade area of northern California. ... In bird and mammal biology, altricial species are those whose newly hatched or born young are relatively immobile, have closed eyes, lack hair or down, and must be cared for by the adults. ...

External links

Wikimedia Commons has media related to:

Tamiasciurus douglasii

• Douglas Squirrel Facts
• Tracks and calls of the Douglas Squirrel
• John Muir's account of the Douglas Squirrel
• Squirrel Taxidermy

Image File history File links Commons-logo. ... Wikimedia Commons logo by Reid Beels The Wikimedia Commons (also called Commons or Wikicommons) is a repository of free content images, sound and other multimedia files. ...

References

• Rodent Specialist Group (1996). Tamiasciurus douglasii. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 12 May 2006.
• Ransome, D. B., & Sullivan, T. P. (2002). Short-term population dynamics of Glaucomys sabrinus and Tamiasciurus douglasii in commercially thinned and unthinned stands of coastal coniferous forest. Canadian Journal of Forest Research, 32, 2043-2050.