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The common swift (Apus apus) is a small bird that belongs to the family Apodidae, also known as the swifts. It has a distinctive appearance, with a sleek, streamlined body, long, narrow wings, and a forked tail. It is approximately 16 centimeters in length and has a wingspan of around 40 centimeters. The common swift is dark brown in color and has a pale throat and underparts.
The call of the common swift is a high-pitched, twittering sound, often described as a "screaming" or "screeching" noise. The song is a rapid series of high-pitched notes, which can be heard during the breeding season. The swift is known for its aerial acrobatics and is capable of flying for extended periods without landing. It is estimated that common swifts spend up to 10 months of the year on the wing, only coming to land during the breeding season.
The common swift is a highly adapted bird, with a specialized diet and unique behavior. It feeds primarily on insects, catching them in mid-air using its beak. It also drinks and bathes in flight, using its wings to scoop up water from streams or rain. The common swift is known for its incredible endurance and has been recorded flying up to 200,000 kilometers in a single year. Overall, the common swift is an impressive and fascinating bird, perfectly adapted to a life on the wing.