Iberian Chiffchaff: When Kris got in touch saying he was keen to life tick this rare annual vagrant I couldn't resist Only recently separated from common chiffchaff on the basis of DNA and its distinctive song.
These birders birds resemble common chiffchaff, but generally appearing brighter yellow-olive, often with a longer-billed and longer-winged look similar to a willow warbler.
It's all about their song, its a primary indicator, differing significantly from the common chiffchaff, described as a faster, more musical, and multi-part song.
As we approched the area where the bird had been previously spotted we could hear the birds song. The Iberian Chiffchaff’s song is more complex and musical than the simple "chiff-chaff" of its common relative, typically following a distinct three-part structure.
It begins with several slow, rhythmic notes that transition into a series of rising "swee-swee" sounds, before finishing with a characteristic fast-paced, dry trill on a single pitch. This hurried delivery is further distinguished by its call—a soft, downslurred tseeeu—which contrasts sharply with the rising huit call of the Common Chiffchaff.
