How to Construct Concept Map Cloud on Birds
Birds are
vertebrate animals that have feathers, wings, and beaks. Like all vertebrates,
they have bony skeleton. Most birds are able to fly, but some (like ostriches
and penguins) cannot fly even though they still have wings. Other kinds of
animals like insects and bats can fly too, but birds are the only animals with
feathers. Birds have scales on their lower legs and feet, like reptiles. All
birds reproduce by laying eggs with hard shells, and most build nests to help protect
the eggs from weather and predators. Adult birds almost always sit on the eggs
to keep them warm until they hatch.
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