My favorite animal ever is definitely a Thylacine (Tasmanian Tiger)-
an extinct carnivorous marsupial from Australia/Tasmania.
They could open their jaws wider than any other land mammal, but they weren't horrid and viscous like people think they are- but they were accused of killing farmers' sheep (which it was recently proven that couldn't happen because of their low jaw strength). So because of that they were persecuted by the ranchers and killed off. Last one died in captivity in the 30's.
They ate kangaroos and wallabies and both genders had pouches. ouo
They could even stand up on their hind legs to survey the area like a kangaroo.
They're just such unique animals, I adore them! <3
(http://upload.wikimedia.org/wikipedia/commons/4/47/%22Benjamin%22.jpg)
(http://d3lp4xedbqa8a5.cloudfront.net/s3/digital-cougar-assets/AusGeo/2013/09/11/8301/tassie-tiger-main.jpg)
(http://www.wherelightmeetsdark.com/images/newswatch/Tasmanian_tiger.jpg)
You can learn more about the Thylacine here: Link! (http://www.naturalworlds.org/thylacine/)