Animals: vertebrates and invertebrates

Animals can be grouped by whether they have a backbone.

Vertebrates (have a backbone)

• Mammals: have hair or fur and feed their young on milk. Example: cow, human, goat.
• Birds: have feathers and lay eggs. Example: hen, eagle.
• Fish: live in water, breathe through gills and have scales. Example: tilapia.
• Reptiles: have dry scaly skin and lay eggs on land. Example: snake, lizard, tortoise.
• Amphibians: live both in water and on land and have moist skin. Example: frog, toad.