African Harrier-Hawk
Polyboroides typus
A large, grayish, naked-faced hawk with broad wings. The small, bare, yellow (sometimes flushed red) face, white-banded black tail, and underwing pattern distinguish it. The immature is blotchy brown with yellow-green facial skin and barred flight feathers. Harrier-hawks are specialists, foraging on eggs and nestlings, and they have double-jointed knees which allow them to access nest holes and other confined spaces. They are often seen clumsily clambering around on cliffs and trees when foraging. Although similar to chanting-goshawks, African Harrier-Hawk’s long but small angular head, broad wings, and tail pattern are diagnostic.
Identification
The African harrier-hawk is a medium-sized raptor. The upperparts, head and breast are pale grey. The belly is white with fine dark barring. The broad wings are pale grey with a black trailing edge fringed with a narrow white line. The tail is black with a single broad white band. There is a bare facial patch of variable colour, usually red or yellow. Sexes are similar, but young birds have pale brown instead of grey, and dark brown replacing black. An unusual trait of this species is the double-jointed ankles it possesses, which enable it to reach into otherwise inaccessible holes and cracks for prey. A comparable leg-structure and behaviour can be found in the Neotropical crane hawk as well as the extinct Australian Pengana; a case of convergent evolution.<p>The call is a whistled sueee-sueee-sueee.
Taxonomy
- Scientific name
- Polyboroides typus
- Authority
- Smith, A, 1829
- Order
- Accipitriformes
- Family
- Accipitridae
- Genus
- Polyboroides
Range and habitat
African harrier-hawks are a common raptorial species south of the Sahara being most commonly found in the tropical regions of western Africa becoming less common in East and South Africa. African harrier-hawks are adaptable in their habitat preferences, occupying the following habitats in the Dzanga-Sangha Special Reserve in the Central African Republic: thick rainforest, forest edge, riparian areas, agricultural land and human occupied areas. African harrier-hawks are adaptable and able to live in both urban and rural human occupied areas and they are one of the most common raptorial species in traditional rural villages of eastern Guinea-Bissau. African harrier-hawks have also been known to breed in Palm trees present in cities and urban gardens.
- Migration
- Resident species
Conservation
- Population trend
- stable
Photos
Distribution
Bird Calls
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