The chimney swift, a small and fast-flying bird, is often called by a variety of other names, including chimney swallow, chimney martin, chimney sweep, and American swift. These birds are well-known for their aerial acrobatics and their ability to build their nests inside chimneys using twigs and saliva. Although they have a wide range of synonyms, the term "chimney swift" is the most commonly used because of its accuracy in describing the bird's habitat and behavior. With their swift flight and incredible agility, these birds are a stunning sight to see as they dart and swoop through the air in search of insects to feed their young.