Endangered animals: classes and body parts

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Across
  1. 2. these animals can fly, have a beak and normally have wings
  2. 4. these animals are very small and normally feed on nectar
  3. 8. these animals drink their mother's milk
  4. 9. these body parts are on the heads of animals and can be used to fight
  5. 10. mammals have it to protect their bodies from the cold
  6. 11. some animals, like fish and reptiles, have them on their skin
  7. 13. these animals have got cold blood and have got scales
Down
  1. 1. birds and insects use them to fly
  2. 3. some fish use them to swim
  3. 5. animals can see thanks to them
  4. 6. some mammals use it to climb trees, it can be short or long
  5. 7. birds have these and they are very colourful and very light
  6. 12. some reptiles use it to protect their bodies
  7. 14. animals use these to chew their food