Common cuckoo

This is a medium-sized migratory bird, identifiable by its «cuckoo» call heard between April and July in woods and open spaces.The females seek out the nests of small passerine birds and when she finds a nest with eggs in it, she eats one of them and lays another in its place. In the parasitised nest, the cuckoo chick hatches first and ejects the other eggs from the nest so that it is raised, alone, by its adoptive parents