Two faced

No, your eyes do not deceive you, this duckling really does have two heads.

Two headed animals are very rare but they do occur and are in fact conjoined twins. The twins can join pretty much anywhere which is why, apart from two headed animals you can end up with four legged chickens, seven legged lambs and so on. Such creatures tend not to survive in the wild but some conjoined twin animals live quite long lives in captivity. When they die they may end up stuffed and can trade for very high prices.

This is not a "real" conjoined duckling but in fact an extra head stitched on to a normal ducklings body this is known as a gaff.