animals that have become extinct because of poaching?
['Woolly Mammoths. The last of the Great Woolly Mammoth populations vanished near the end of the last Ice Age over 4,000 years ago. ... ', 'Caspian Tigers. ... ', 'Thylacines (Tasmanian Tigers) ... ', 'Dodos. ... ', 'Passenger Pigeons. ... ', 'Polar Bears. ... ', 'Muskox. ... ', 'American Crocodiles.']