Clark's Nutcracker

Nucifraga columbiana

Clark's nutcracker, also known as Clark's crow, is a passerine bird in the family Corvidae, native to the mountains of western North America. The nutcracker is an omnivore, but subsists mainly on pine nuts, burying seeds in the ground in the late summer and fall, and then retrieving them in the winter and spring by memory. The bird was described by the Lewis and Clark Expedition, with William Clark first observing it in 1805 along the banks of the Salmon River, a tributary of the Columbia River. Source

Where it is now

In the last 8 weeks this bird was recorded 198,786 times across 22 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 30°C (typically 26 to 33°C, from 12 areas).

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.