This document describes characteristics of different animal groups. Mammals give birth and feed offspring with milk, breathe with lungs, and have fur. Amphibians have webbed feet and moist skin while reptiles have scales and lay eggs. Birds have feathers, wings, are warm-blooded and also lay eggs, while fish have scales, fins, gills and lay eggs.

3. mammals

5. They give birth

7. to feed offsprings with milk

9. to breathe with lungs

11. fur

13. amphibians

15. webbed feet

17. moist, smooth skin

19. reptiles

21. scales

24. cold-blooded

25. lay eggs

27. birds

29. feather

31. wings

33. warm-blooded

35. fish

37. scales

39. fins

41. gills

43. lay eggs