A few nice animals that are extinct images I found:
Breaking News - Brontosaurus Found Roaming near Petrolia
Image by jumpinjimmyjava
Once thought to be extinct, Brontosaurus, is a genus of sauropod dinosaur that lived about 150 million years ago, during the Jurassic Period. It was one of the largest land animals that ever existed, with an average length of 23 m (75 ft) and a mass of at least 23 metric tons. The people of the little Victorian oil town of Petrolia have really taken to her and renamed her Petroliasaurus. Though rarely seen, she is wondrous to behold !
Antlers from the ceiling
Image by celesteh
24 June 2009
The antlers belong to an animal that has been extinct for ages, but they were preserved in bogs and then used for decoration inside the main hall of Bunratty Castle. Ireland
Image by lutherlabs
According to Andy: the panda is the only animal that seems to want to be extinct. It only eats food that has no nutritional value, and has little to no interest in sex. So take a good look while you can.