Previously thought to be a subspecies of the Common Chiffchaff, the Canary Islands Chiffchaff has been declared a separate species on the basis of DNA analysis; also different sounds and smaller with shorter, rounder wings. Unlike the Common Chiffchaff, it is non-migratory.
Taking a bath in a puddle
Chiffchaff in strelitzia -- it is a useful pollinator
The Iberian Chiffchaff is also present in the Canary Islands