Weekend bias at observatories

Author(s): Sharrock, J.T.R.

Published: January 1970

Journal: Bird Study Volume: 17

Digital Identifier No. (DOI): 10.1080/00063657009476257

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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Weekend bias at observatories

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