Are any of these animals already taken by open source projects?

Bear
Bee
Bird of some kind
Butterfly
Cat
Cow
Crab
Dolphin
Donkey
Duck
Elephant
Fish
Frog
Giraffe
Goat
Gorilla
Insect of some kind
Kangaroo
Lion
Mouse
Pig
Rabbit
Rhino
Sheep
Snake
Spider
Squirrel
Tiger
Tortoise
Whale