Birdsong field guide
Rock Ptarmigan
Lagopus muta
The Rock Ptarmigan is a hardy, medium-sized grouse adapted for life in extreme arctic and alpine environments, famous for its seasonal plumage changes. It serves as a key indicator species for the health of high-altitude and high-latitude ecosystems.
What it sounds like
A dry, low-pitched croaking rattle or 'karr-karr' sound, often compared to the noise of a finger running across the teeth of a plastic comb.
Reference call, compare with what you heard
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Field notes
- Undergoes three distinct molts per year, transitioning from mottled brown in summer to pure white in winter for near-perfect camouflage.
- Possesses densely feathered toes that act as natural snowshoes, increasing surface area for walking on soft snow while providing insulation.
- The male features a distinctive fleshy red comb above the eye that becomes engorged and more prominent during the breeding season.
- Known as 'Raichō' or 'Thunder Bird' in Japan, where it is a protected national symbol and inhabitant of high mountain peaks.
- Maintains a highly specialized digestive system with a long cecum to ferment and extract nutrients from woody tundra vegetation like birch and willow buds.
Habitat
Barren, rocky tundra and high-altitude alpine zones above the timberline.
Range
Circumpolar distribution across northern North America, Greenland, Iceland, Northern Europe, and Northern Asia.
Similar & commonly confused birds
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