Birds egg, common cuckoo, Cuculus canorus Ssp canorus Linnaeus, 1758, cuckoo egg found with 4 foster parent eggs in Eurasian reed warbler nest, Acrocephalus scirpaceus (Hermann, 1804), near Reading, Berkshire, England, 1964

Birds egg, common cuckoo, Cuculus canorus Ssp canorus Linnaeus, 1758, cuckoo egg found with 4 foster parent eggs in Eurasian reed warbler nest, Acrocephalus scirpaceus (Hermann, 1804), near Reading, Berkshire, England, 1964
Birds egg, common cuckoo, Cuculus canorus Ssp canorus Linnaeus, 1758, cuckoo egg found with 4 foster parent eggs in Eurasian reed warbler nest, Acrocephalus scirpaceus (Hermann, 1804), near Reading, Berkshire, England, 1964