Yellow-billed Cuckoo

Coccyzus americanus

Your tailbone is named after this bird's family: 'coccyx' comes from the Greek for cuckoo, because it looks like a cuckoo's bill. Its scientific name, Coccyzus, comes from the same word, meaning 'to cry cuckoo.'

Coccyzus comes from Greek kokkuzō, 'to cry cuckoo'; americanus means 'of America.'