I have heard from others that Chiffchaffs were encountered in the first few days of March, however, I recorded my first rather later on the 11th of March.
At the time of writing, Chiffchaffs are now well established on their breeding grounds with good numbers seen and heard at many sites.
Chiffchaff at Great Melton, Norfolk, 22nd March |
Chiffchaff Great Melton, Norfolk 22nd March |
The Chiffchaff has a habit of a frequent downward movement of its tail, Willow Warblers may only do this once, or never.
Song can be interestingly, I have encountered a few Willow Warblers which have opened a verse of song with the Chiffchaff "chiff-chiff-chaff-chiff-chaff" before breaking into its own song, a case of mimicry perhaps.