Animal groups!

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Across
  1. 3. Their body is covered in scales, and they have fins instead of legs!
  2. 6. A very special mammal that lays eggs!
  3. 7. Humans, bears, rabbits and horses are all ______.
  4. 9. _____ is the largest group of animals on Earth.
  5. 10. They have wings and feathers, They lay eggs.
Down
  1. 1. They can breathe through gills or through their skin. They lay eggs in water.
  2. 2. Fish breathe using their ________.
  3. 4. Reptiles' blood is _______.
  4. 5. Mammals have _______ blood.
  5. 8. This bird lives in very cold weather. It can swim, but it can't fly!