Species group · Birds
WAnimals has 2 species of ptarmigan, in the family Phasianidae.
Ranges calculated from the profiles that record the figure, not from all 2.
Each one has its own full profile. This group does not replace them: it brings them together.
No species documented in this group is genuinely at risk according to the IUCN, with the data available today.
Recorded in 20 countries. The ones with the most species in the group:
It moults into wholly white plumage in winter, and its feathered feet let it walk on snow.
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It moults three times a year instead of twice, matching the white of the snow, the mottling of the thaw and the grey of the summer rock: it is one of the most precise seasonal camouflages in the animal kingdom.
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The Pyrenean population is a glacial relict: it was left isolated on the summits when the ice retreated and has nowhere higher to go as the climate warms.
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The British subspecies is the only one in the world that does not turn white in winter: on islands where lasting snow is rare, white camouflage would be counterproductive.
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Its populations fluctuate in cycles of several years driven by an intestinal nematode, a mechanism demonstrated experimentally and a classic case of population regulation by parasites.
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The heather moors of Scotland are managed by burning them in patches to maximise grouse density for shooting, a practice that shapes the landscape of large parts of the Highlands and that generates permanent environmental controversy.
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