Movements as an indicator of population changes

Author(s): Williamson, K.

Published: January 1963

Journal: Bird Migration Volume: 2

BirdTrack migration blog – early spring

It may still feel like winter but for some species, the increasing temperatures and lengthening days have already kick-started spring migration, with birds starting to arrive and depart across Britain and Ireland.

Tagged Lesser Black-backed Gull. Gary Clewley

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Movements as an indicator of population changes

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