British Birds March 2020

Published on 03 March 2020 in Latest issues

Chiffchaffs wintering at a sewage works in south Devon  Ringing of Common Chiffchaffs during three consecutive winters at a sewage works in south Devon revealed that the site supported a wintering population of at least 90 birds but capture–recapture models suggesting the true figure could be between 188 and 227. Many birds were site faithful, both within and between winters. Their sedentary behaviour may be driven by the continuity of insect prey.

Calls of crossbills in Scotland: association with bird size and changes over time  Crossbills of different average size in Scotland give different flight and/or excitement calls. Using calls to identify crossbills is less subjective than trying to discern small differences in bill size, and the results of this study may help observers who record crossbill calls.

Two-egg clutches in the Fulmar  In this study, eight two-egg clutches of the Fulmar in the Faroes were examined, to assess whether those eggs may have been laid by the same female. The results suggest that the eggs in two-egg clutches were laid by different females.

White-rumped Swift in Yorkshire: new to Britain  On the afternoon of 14th October 2018, a White-rumped Swift was found at Hornsea Mere, Yorkshire. The record has been accepted by BBRC and BOURC and added to Category A of the British List.

BB eye  Do taxonomic changes affect conservation?

Obituaries  Chris Naylor, Rod Martins

Letters  Common Sandpiper: shifting baselines; Aerial hunting by a Short-eared Owl; Birding in an emergency

Notes  Reverse mounting by three European Dendrocopos woodpeckers; Red-backed Shrike feeding at night; Blue Tit feeding a Great Tit brood

Book reviews, News & comment and Recent reports complete the March issue.

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