European Bee-eater (Merops apiaster) pair perched together on twig, Bulgaria

vertebrates bee eater bulgaria birds bird animals pairs insectivore pair colourful eastern european eastern east bee eaters european behaviour wildlife eastern europe nature couple coraciiformes vertical aves bulgarian meropidae colour east europe insectivorous zoology twig merops breeding bird east european vertebrate developed countries developed country european apiaster verticals meropidae europe couples animal europe