1) Caspian Tiger
Once prevalent throughout central Asia and both south and west of the Caspian Sea, Caspian tigers were distinct from other species due to their large size, though still outclassed by their extant Siberian counterparts. Multiple factors contributed to the eventual extinction of the tigers. The wild pigs they preyed upon diminished as a result of over hunting and widespread disease. And during the early 20th century, by order of the Russian government, soldiers were deployed to wipe out Caspian tigers when converting their natural habitat into cropland. The exact date of their extinction is debatable, but some experts contend it was sometime during the '70s.