The index of Heron population, 1945 (with a supplementary note on "the balance of population in the heron" by David Lack)

Author(s): Alexander, W.B.

Published: January 1946

Journal: British Birds Volume: 39

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.

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The index of Heron population, 1945 (with a supplementary note on "the balance of population in the heron" by David Lack)

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