Clamator

Clamator is a genus of large brood-parasitic cuckoos with crests and graduated tails. There are four species:

Clamator cuckoos are found in warmer parts of southern Europe and Asia, and in Africa south of the Sahara Desert. These are birds of warm open scrubby habitats, but some species are at least partially migratory, leaving for warmer and wetter areas in winter.