Phylloscopus is a genus of small passerine birds commonly known as leaf warblers. They are primarily found in Europe, Asia, and parts of Africa, often inhabiting woodlands, scrublands, and gardens. These birds are characterized by their slender bodies, short wings, and distinctive songs, which they use for communication and attracting mates. Leaf warblers are typically insectivorous, feeding on small insects and larvae. They are known for their migratory behavior, with many species traveling long distances between breeding and wintering grounds. Their adaptability to various habitats makes them an important part of the ecosystem.