Purple Martin (Male)
The Purple Martin (Progne subis) is the largest North American swallow at 20 cm length. Adults have a slightly forked tail. These “aerial acrobats” have speed and agility in flight, and when approaching their housing, will dive from the sky with their wings tucked at great speeds.
Edward Howe Forbush Useful Birds and Their Protection (Boston, MA: Massachusetts State Board of Agriculture, 1907)