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The white-tailed ptarmigan is listed as being of "Least Concern" by the International Union for Conservation of Nature. This is because, although populations may be in slight decline, its range is too wide and the total number of birds too large to fit the criteria for being listed as "Vulnerable". [1]
Range and status Willow ptarmigan (also willow grouse) Lagopus lagopus (Linnaeus, 1758) Summer: marbled brown and reddish with black tail and white underparts; winter: most subspecies have white plumage except for black tail. 10–20 subspecies. Circumarctic range in forest and moorlands of northern Eurasia and North America. Status: Least Concern.
The willow ptarmigan is a medium to large ground-dwelling bird and is the most numerous of the three species of ptarmigan.Males and females are about the same size, the adult length varying between 35 and 44 centimetres (14 and 17 in) with a wingspan ranging from 60 and 65 centimetres (24 and 26 in).
A white-tailed ptarmigan, common above timberline. This is a comprehensive listing of the bird species recorded in Rocky Mountain National Park, a 265,461 acres (107,428 ha) park in the U.S. state of Colorado. This list is based on one published by the National Park Service (NPS). [1]
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White-tailed ptarmigan. Order: Galliformes Family: Phasianidae. Phasianidae consists of the pheasants and their allies. These are terrestrial species, variable in size but generally plump with broad and relatively short wings. Many species are gamebirds or have been domesticated as a food source for humans. Wild turkey, Meleagris gallopavo
The high altitude of the Pecos provides a cool change from the lower deserts and brushlands. Temperatures vary with season and elevation. Summer daytime temperatures average 70 °F (21 °C), dropping to lows of 30 °F (−1 °C) at nighttime. Fall and springtime highs range from the 50s to lows in the teens.
Most bird species which are endemic to this region have ranges which are too large to qualify for BirdLife International's restricted-range endemic status. As a result, only one Endemic Bird Area has been defined, in California. List of species. The following is a list of species endemic to this region: