Birds egg, common cuckoo, Cuculus canorus Ssp canorus Linnaeus, 1758, cuckoo egg found with 3 foster parent eggs in marsh warbers nest, Acrocephalus palustris (Bechstein, 1798), at Yalding, Kent, England, 1936

Birds egg, common cuckoo, Cuculus canorus Ssp canorus Linnaeus, 1758, cuckoo egg found with 3 foster parent eggs in marsh warbers nest, Acrocephalus palustris (Bechstein, 1798), at Yalding, Kent, England, 1936
Birds egg, common cuckoo, Cuculus canorus Ssp canorus Linnaeus, 1758, cuckoo egg found with 3 foster parent eggs in marsh warbers nest, Acrocephalus palustris (Bechstein, 1798), at Yalding, Kent, England, 1936