It was developed based on a request for userboxes describing different animals eating the userbox. Currently, the userbox supports the following animals: alligator (or gator), bear, cheetah, cougar, coyote, crocodile, dingo, duck, eagle, falcon, fox, giraffe, guinea pig, hawk, hippopotamus (or hippo), jaguar, komodo dragon, leopard, lion, monkey, naked mole-rat, octopus, owl, piranha, python, sea lion, shark, tiger, wolf, and wolverine. If other animals are desired, feel free to suggest them on the talk page. If an unsupported animal is listed, a human mouth is the default image.
An additional parameter, an=, can be set to y to display "an" instead of "a" for instances where the animal's name begins with a vowel.