http://en.wikipedia.org/wiki/Onomatopoeia

Animal Onomatopoeia. The sounds that animals make are complicated even in English, but it’s important to be aware that — contrary to what one might expect — in different parts of the world, the words used for animal sounds are quite different. Sheep do not universally go baa, nor do ducks quack everywhere in the world. Here are some common English renderings:

cat mew/meow

cow moo/low

horse neigh/whinny

dog bark/woof/bow-wow

pig oink lion roar

bird tweet hen cluck

chick peep

rooster cock-a-doodle-doo/crow

http://www.wisegeek.com/what-is-onomatopoeia.htm

Cheers,

Bruce

http://www.davisfarmland.com/fun/funsound.htm