So I was reading up on extinct animals today- I really should have been working, but I got sidetracked after I discovered the Thylacine, a dog-like marsupial that was announced extinct in the 80s. They looked really great. This led me to investigate other extinct and interesting creatures.
Thylacine, Australia (most recently Tasmania)
Glyptodon (North America)
Woolly Rhinoceros, British Isles
http://en.wikipedia.org/wiki/List_of_extinct_animals Do some reading on the hundreds of extinct animals documented here. Do you have a favorite?