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Classes of animals - Coggle Diagram
Classes of animals
fish
live in water, have gills to respire, and have fins, they are mostly oviparous.
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birds
Most birds can fly, they have feathers, they are oviparous, they lay eggs with a hard shell.
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reptiles 
are mostly oviparous, they have scales on their skin and the young are born on land. They live mostly in water, and some live exclusively on land.
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mammals
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they give birth to fully formed babies and feed them with milk. Most mammals have hair or full and all are viviparous.
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amphibians
they are mostly oviparous,the young are born in water, but the adults can live on land. They have gills when they are born, but develop lungs as adults. Their skin is wet.
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