Narluga
Narlugas are the only hybrids that are born with both narwhal and beluga whales in their wombs. Since the two species shared the same geographical environment, climate change may be to blame for their decision to mate. Narlugas had big heads and a narwhal-like coloration but no horns. Their body was shaped like a beluga whale.
Mule Bird
Despite its attractive appearance, the mule bird was a mixed breed between a canary and a goldfinch. It was also known as British finches because it was once bred as a house pet. Many citizens attempted to hunt or catch them in the United Kingdom. The government decided to intervene in 1981, declaring it illegal to hunt or kill this creature.