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The American kestrel (Falco sparverius) is the smallest and most common falcon in North America. Though it has been called the American sparrowhawk, this common name is a misnomer; the American kestrel is a true falcon, while the Eurasian sparrowhawk, Accipiter nisus, is not in the Falco genus and is thus genetically unrelated to the American ...
The American kestrel is the only New World species termed "kestrel". The molecular data of Groombridge [ 1 ] as well as morphological peculiarities (like grey wings in males and a black ear-spot) and biogeography , strongly support the view that this species, among the Falco falcons, is not a kestrel at all in the phylogenetic sense but perhaps ...
The common kestrel (Falco tinnunculus), also known as the European kestrel, Eurasian kestrel or Old World kestrel, is a species of predatory bird belonging to the kestrel group of the falcon family Falconidae. In the United Kingdom, where no other kestrel species commonly occurs, it is generally just called "kestrel". [2]
Troubling declines for American kestrels Another concerning trend occurring in Cascade County and being observed nationally is a continued decline in the numbers of American kestrels. “Kestrels ...
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Though the merlin is only slightly larger than the American kestrel in dimensions, it averages about one third to one half larger by weight, with this weight mostly being extra muscle that gives it greater speed and endurance than the kestrel. [43] Like the American kestrel, the merlin offers the modern falconer the ability to hunt year round ...
Juvenile grey kestrels are browner than the adults with a greenish cere and greenish around the eye. Juvenile Dickinson's kestrels are similar but have a barred tail and a more strongly barred underwing. The grey kestrel is generally silent outside the breeding season but has a shrill, chattering call and a rattling whistle.
A study of mtDNA cytochrome b sequence data of some kestrels [17] identified a clade containing the common kestrel and related "malar-striped" species, to the exclusion of such taxa as the greater kestrel (which lacks a malar stripe), the lesser kestrel (which is very similar to the common, but also has no malar stripe), and the American ...