Animals are multicellular organisms that usually can move.

There are over 1.5 million known species of animals.

Animals are classified into groups like mammals, birds, reptiles, fish, and amphibians.

Mammals have hair and produce milk for their young.

Birds have feathers and lay eggs.

Reptiles have scales and are cold-blooded.

Fish live in water and breathe with gills.

Amphibians can live both in water and on land.

Some animals migrate long distances for food or breeding.

Animals play important roles in ecosystems as predators, prey, and pollinators.