Altitudinal migrationMovement of highland birds down to lower levels for the winter and back to higher altitudes for the breeding season, the birds concerned not being involved in migration in the usual sense. The Red Grouse Lagopus lagopus and the Dipper Cinclus cinclus provide examples.
Search Bird Dictionary
From Peter Weaver's Birdwatcher's Dictionary
Copyright © 1981 by Peter Weaver