CUC cat frog dog butterfly Animals A mammal is an animal that can drink milk from its mother. Most mammals, such as dogs and cats, have got fur. A bird is an animal that has got feathers, two wings and two legs. Most birds, such as canaries and parrots, can fly, but penguins can't. We can find fish in the water. Most fish, for example trout, have got fins and scales. An insect is an animal that has got three main body parts and six legs. Some insects, such as butterflies, have got wings. An amphibian can live some time in the water and some time on land. Most amphibians, such as frogs, have got smooth skin. trout​