Some winter flocks of Lapland Longspurs have been estimated as large as four million birds. During snowstorms, such flocks sometimes collide with lighted structures such as radio towers, and thousands can be killed in a single night.
The Lapland Longspur breeds in the high arctic with continual daylight during the summer, and a breeding male may sing at any hour of the day. Despite the lack of a real dawn, the male tends to sing most in the early morning.
Longspur refers to the elongated claw of the hind toe.
The oldest recorded Lapland Longspur was at least 5 years old when it was recaptured and rereleased during banding operations in Alaska.