We can now enjoy new animals and natural elements in Minecraft 1.7.2.
More Nature 1.7.2 and 1.7.10 is a mod that adds new creatures to the game, some of which are terrestrial and other marine. New creatures you find your Minecraft worlds are snakes, birds of various colors, whales, centipedes, grasshoppers, butterflies, stripes or blankets, rats and lizards.

Detail and Download here : More Nature Mod 1.7.2 and 1.7.10

Homepage: Mods for Minecraft