Bees buzz. Crows caw. Chicks cheep or peep. Cattle actually low. Cats also purr and kittens mew. Frogs croak. Geese honk.
Mice and rats squeak. Some birds squawk. Wolves howl. Hawks, some owls, and a few other birds shriek. Jays screech, or well, are just annoying. grin Other words I can think of, but not limited to a specific anim
You can have some fun with your class if you ask them to make the actual sounds lithat animals make, and compare them to the English sounds. eg English sheep say 'baaaaa'. What do Chinese sheep say?'