Falco sparverius
Until the sixth edition of the AOU Checklist of North American Birds was published by the American Ornithologists' Union in 1983, the most commonly used name for the American kestrel was the "sparrow hawk". This was due to a mistaken connection with the Eurasian sparrowhawk in the genus "Accipiter". The sixth edition of the AOU Checklist corrected this, officially renaming the bird "American kestrel". Several other colloquial names for the kestrel are also in use, including "grasshopper hawk", due to its diet, and "killy hawk", due to its distinct call.