Dodo

The Dodo is a lesson in extinction. Found by Dutch soldiers around 1600 on an island in the Indian Ocean, the Dodo became extinct less than 80 years later because of deforestation, hunting, and destruction of their nests by animals brought to the island by the Dutch.

his heron is classified as Critically Endangered because it has an extremely small and rapidly declining population. This decline is projected to increase in the near future as a result of the loss and degradation of lowland forest and wetlands, and through direct exploitation and disturbance.

Steller's sea cow sea cow, (Hydrodamalis gigas), also called Steller's sea cow, very large aquatic mammal, now extinct, that once inhabited nearshore areas of the Komandor Islands in the Bering Sea. Steller's sea cows were wiped out by hunters in the 18th century less than 30 years after they were first discovered by Arctic explorers

Fishing is the main threat, but it is also threatened by habitat loss. Because of the potential threat they (or rather their "saw") represent to humans, they are sometimes killed before being brought onto the boat when accidentally caught.