Halszkaraptor

This swan-necked dinosaur from Mongolia upended what we thought about raptors when discovered in 2017. Instead of chasing prey on land, Halszkaraptor had flattened limbs for swimming and likely hunted fish like modern waterfowl. Though related to Velociraptor, this dinosaur adapted to semi-aquatic life with a long flexible neck and nostrils positioned high on its snout for breathing while partially submerged.