The Grey Cuckoo

This is a medium-sized migratory bird, identified by its "cuckoo" song, from April to July, between woodland and open spaces.The females seek out the nests of small sparrows and eat one of the eggs of the occupied nest before laying their own. In the cuckooed nest, the cuckoo chick, which is born before the others, will eject all the other eggs so it can be raised by its adoptive parents!