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The crested honey buzzard (Pernis ptilorhynchus) [3] is a bird of prey in the family Accipitridae, which also includes many other diurnal raptors such as kites, eagles, and harriers. Pernis ptilorhynchus has six subspecies. As a medium-sized raptor, their size ranges between 57–60 cm (22–24 in).
Birds of prey or predatory birds, ... Falcons and kestrels are medium-size birds of prey with long pointed wings, ... Bird of Prey Pictures;
Scale-like feathers around the eyes and forehead provide armour against the stings of its prey species. [10] The relatively straight claws facilitate digging and walking. [ 10 ] Immature birds have a dull iris and yellow cere .
[20] [25] A raptorial prey comparison estimated that the mean prey weight for eagle-owls in Europe was 294.7 g (10.40 oz) as a mean among 5 main regions, the highest of any owl but similar or slightly lighter than the European average for northern goshawks (Accipiter gentilis) and considerably lower only than two widespread European eagles.
The osprey differs in several respects from other diurnal birds of prey. Its toes are of equal length, its tarsi are reticulate, and its talons are rounded, rather than grooved. The osprey and owls are the only raptors whose outer toe is reversible, allowing them to grasp their prey with two toes in front and two behind.
This sexual difference in size is most pronounced in active species that hunt birds, such as the Accipiter hawks, in which the size difference averages 25–50%. In a majority of species, such as generalist hunters and rodent -, reptile -, fish -, and insect -hunting specialists, the dimorphism is less, usually between a 5% to 30% size difference.
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Marked size difference in this direction is unusual in higher vertebrates but typical in birds of prey, [19] and most marked in birds of prey which hunt other birds. [ 18 ] The adult male is 29–34 cm (11–13 in) long, with a wingspan of 59–64 cm (23–25 in) [ 8 ] and a mass of 110–196 g (3.9–6.9 oz). [ 12 ]
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