Botany - Biodiversity and its Conservation Question with Solution | TestHub

Steller's sea cow is an extinct sirenian described by Georg Wilhelm Steller in 1741. At that time, it was found only around the Commander Islands in the Bering Sea between Alaska and Russia. The passenger pigeon or wild pigeon is an extinct species of pigeon that was endemic to North America. Its common name is derived from the French word passenger, meaning 'passing by', due to the migratory habits of the species. These two species became extinct in the last 500 years due to over-exploitation and consumption by humans.