Glassfrog. They are amazing transparent frogs that are found in Central and South America. They are nocturnal and live in the tree canopy, rarely venturing low; although some do make their homes closer to the ground, living in the vegetation around small forest streams.
Though few ligers exist, they may not exactly be endangered, since they are not thought to exist in the wild. It's a matter of geography and genetics: Lions generally live in Africa, tigers in Asia. Plus, interspecies breeding tends to result in "diminished fitness of the offspring," according to Ronald Tilson, director of conservation at the Minnesota Zoo in Apple Valley.
A Liger. This is what happens when a male lion mates with a female tiger. I did not know such a species existed, and they are gorgeous.
June 5, 2007—Sporting a flashy pattern of lavender on black, this newfound species of toad is among two-dozen animals that scientists discovered recently in the highlands of the northern Amazon.
At 0.2 millimeters long, this fairy-fly wasp may be one of the smallest insects in the world, but its image scored the biggest prize in the 2008 BioScapes contest.
The turritopsis nutricula, an immortal species of jellyfish: Since it is capable of cycling from a mature adult stage to an immature polyp stage and back again, there may be no natural limit to its life span. Scientists say the hydrozoan jellyfish is the only known animal that can repeatedly turn back the hands of time and revert to its polyp state (its first stage of life).