Definition
Animalia is the biological kingdom that encompasses all animals on Earth. Think of it as the ultimate club for all living creatures that aren't plants, fungi, protists, or bacteria. Members of Animalia are multicellular, heterotrophic (meaning they eat other organisms for energy), and can usually move around. This kingdom includes everything from tiny insects to giant whales. It highlights the incredible diversity and complexity of life on our planet. Animalia also implies the shared characteristics that link all animals together.