Chat (bird) in the context of "Nightingale"

The common nightingale, rufous nightingale or simply nightingale (Luscinia megarhynchos), is a small passerine bird which is best known for its powerful and beautiful song. An Old World flycatcher, it belongs to a group of more terrestrial species, often called chats. Its range partly overlaps with that of the more northerly thrush nightingale (Luscinia luscinia), a closely related species with which hybrids have occurred.