Bird Worksheets

Did you know that birds share several traits with humans? Like humans, birds have four-chambered hearts. Birds and mammals are the only animals that have such hearts. Birds and people are warm-blooded, which means they are capable of sustaining a fairly constant body temperature. This allows them to live in varied climates. Like humans, most bird parents invest a large part of their lifetimes raising their young. Learn about the many different varieties of birds that live on and around all seven continents of the world.