Rare breeding birds in the United Kingdom in 2012: Mark Holling and the Rare Breeding Birds Panel

摘要

This report documents the status of 94 rare or scarce species which were recorded breeding, or potentially breeding, in the UK in 2012. The year was marked by the first breeding by Great White Egrets Ardea alba and a significant influx of Baillon's Crakes Porzana pusilla, unprecedented in modern times. Late spring and summer were exceptionally wet, which hampered fieldwork and reduced productivity of some species.