The Phylloscopus collybita, commonly known as the common chiffchaff, is a small migratory bird belonging to the leaf warbler family. It is primarily found in Europe and parts of Asia, favoring woodlands, gardens, and scrub areas. The bird is characterized by its olive-brown plumage, pale underparts, and a distinctive, repetitive song that sounds like its name. Common chiffchaffs are insectivorous, feeding mainly on small insects and larvae during the breeding season. They typically breed in dense vegetation, where they build their nests close to the ground. These birds are known for their adaptability and can often be seen flitting through trees and bushes in search of food.