Animals in English are usually referred to as "fauna". Fauna is derived from the Latin word "faunus", which means "animal". Fauna includes all animals that inhabit a specific region or environment, both wild and domesticated.

The most common animals in English include mammals, birds, fish, reptiles and amphibians. Mammals are warm-blooded animals that give birth to live young, like cats, dogs, cows and rabbits. Birds are feathered animals that have wings and lay eggs, such as eagles, sparrows and owls. Fish are cold-blooded animals that live in water, like sharks, salmon and goldfish. Reptiles are cold-blooded animals that have dry skin and lay eggs, like snakes, lizards and turtles. Amphibians are animals that live on land but lay their eggs in water, like frogs and salamanders.

In addition to these main categories, there are also several sub-categories of animals that are often discussed in English. These include insects, arachnids, mollusks, crustaceans, and other invertebrates. Insects are small animals that have six legs and an exoskeleton, like bees, ants and flies. Arachnids are small animals that have eight legs and an exoskeleton, like spiders and scorpions. Mollusks are animals that have soft bodies and shells, like clams and snails. Crustaceans are animals that have hard shells and jointed legs, like crabs and lobsters. Other invertebrates are animals that do not belong to any of the other categories, like worms and jellyfish.

To summarize, animals in English are generally referred to as "fauna". This includes mammals, birds, fish, reptiles, amphibians, insects, arachnids, mollusks, crustaceans, and other invertebrates. All of these animals have different characteristics and can be found in different environments around the world.