Yellow-browed Warbler influx02 Oct 2015
Last month we mentioned Yellow-browed Warbler as a species to look out for in September and October. This autumn already promises to be one of the best ever for them in Britain and Ireland. By the end of September, the species was featuring on more than 2% of complete lists, nearly double the historical average for the same time period. Fair Isle Bird Observatory for example, reported an all-time record count of 53 on the 21st of September, followed by 76 a week later. Shetland and the north-east coast of Britain has reported similarly high counts of Yellow-broweds.
Breeding from the Urals east across Siberia, Yellow-browed Warbler records in Britain and Ireland have been increasing steadily in recent years. The reason for the increase is still unknown, with reverse migration and range expansion all proposed as potential factors. Your records of Yellow-browed Warbler will help provide a better picture of the migration of this extraordinary species.
Migration blog (22nd – 28th October)
Many bird watchers have been lamenting on what a poor autumn it has been so far for migration, with numbers of common, scarce, and expected rare species down on what would normally be expected.
Working together for seabirds
BTO work supports effective monitoring of our seabirds and aims to provide opportunities for a new generation of seabird surveyors.