This is a report about birds in general Very good! Birds are some of the most amazing animals on earth. Most have the ability to fly. Some use ground travel. Some use claws, others use only their beaks. Birds come in many varieties of colors and sizes.         Birds are warm-blooded, egg-laying creatures from the aves class. Along with the obvious feathers and wings, birds have other adaptations for flying such as a wide keel on …showed first 75 words of 751 total…

…showed last 75 words of 751 total…use to control balance and the muscles they use to fly.         Male birds have testes and the female birds have ovaries, just like in other vertebrates. Most birds mate by pressing their vents together. Sperm cells quickly pass into the female's vent and unite with one or more egg cells. The union produces a fertilized egg, or a zygote. When the egg is laid, the zygote develops into an embryo as the egg is incubated.