The relevance of the mapping census technique to the conservation of migratory bird populations

Author(s): Williamson, K.

Published: January 1972

Publisher: US Fish and Wildlife Service, Washington.

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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 relevance of the mapping census technique to the conservation of migratory bird populations

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