A small creature like a worm with legs, that develops into a butterfly or moth (= flying insects with large, sometimes brightly coloured, wings). Caterpillars eat the leaves of plants.
An animal with long legs, that eats grass, leaves, etc. and can run fast. Most male deer have antlers (= horns shaped like branches). There are many types of deer.
An African or Asian animal like a deer, that runs very fast. There are many types of antelope. An antelope is a member of a number of even-toed ungulate species indigenous to various regions in Africa and Eurasia.