Steppe Buzzard

The steppe buzzard (Buteo buteo vulpinus) is a relatively small, long-winged subspecies of common buzzard, usually about 45–50 cm long. It shows pronounced colour polymorphism, meaning that it occurs in several markedly different plumage forms, from pale grey-brown birds to strongly rufous individuals. A warm rufous tail is common and often useful, but no single plumage feature identifies every bird.

Compared with the western nominate common buzzard, steppe buzzards often appear slightly smaller, more agile and longer-winged. Their extreme variation means that several features of structure, tail, wings and plumage often need to be considered together for confident identification.

The steppe buzzard is the strongly migratory eastern subspecies of the common or Eurasian buzzard (Buteo buteo). This page deals specifically with B. b. vulpinus, not with the entire species.

Current taxonomies retain vulpinus as a subspecies of B. buteo. Its boundary with the neighbouring form menetriesi is not always sharp, and birds with intermediate features can make subspecies identification difficult.

On the non-breeding grounds, steppe buzzards favour open landscapes such as grassland, savanna, farmland and open woodland. Raised perches are especially valuable, so poles, fences, dead trees and scattered large trees are frequently used.

Age can influence habitat use. Studies in South Africa found adults more often in open habitats with preferred hunting posts, while younger birds occurred relatively more often in denser vegetation.

Small mammals form much of the diet on the African wintering grounds, supplemented by birds, reptiles, amphibians and large invertebrates. Carrion is also taken when available.

The diet can shift quickly when temporary food sources become abundant, and insect outbreaks or concentrations of other small prey may attract several birds to the same feeding area.

Most hunting on the wintering grounds is done from a perch. A steppe buzzard watches the ground from a pole, fence post, dead tree or other raised lookout and drops rapidly onto prey once it is detected. The birds also search while soaring and may forage on the ground where prey is concentrated.

Adults often secure the best open hunting posts and can displace younger birds. First-year birds may also attempt to steal prey from adults.

On the African wintering grounds, steppe buzzards are usually solitary or loosely spaced rather than strongly social. The large concentrations associated with the subspecies are mainly a feature of migration.

On the breeding grounds, pairs occupy and defend territories and use calls and aerial displays to advertise their presence.

B. b. vulpinus breeds from northern Scandinavia and eastern Europe across Russia and western-central Siberia into parts of Central Asia. Most birds move south in autumn to sub-Saharan Africa, while some winter farther east in southern Asia. Birds reaching southern Africa generally arrive during October and November and remain through the austral summer before departing north again around March and April.

Like many broad-winged raptors, steppe buzzards use thermals—columns of rising warm air—to gain height with little energy expenditure before gliding onwards. At migration bottlenecks they can form spectacular streams numbering thousands.

The annual moult is closely fitted around the two long migrations. Adults may replace some flight feathers on the breeding grounds, pause the moult during migration and continue after reaching Africa. The winter moult is unusually irregular, and flight feathers do not necessarily follow one simple replacement sequence. The time spent on the non-breeding grounds is also too short to replace the entire set every year.

Breeding begins after the birds return north in spring. Pairs usually build or reuse a substantial stick nest in a tree, although cliffs or artificial structures may be used locally.

Two to four eggs are typical in common buzzards. Incubation lasts about five weeks, and the young remain in the nest for another six to eight weeks before fledging. The chicks hatch poorly developed and depend on their parents for warmth and food. Both parents contribute to provisioning and defence of the young.

The steppe buzzard is not assessed separately by the IUCN. Its Red List status therefore follows the parent species Buteo buteo, which remains listed as Least Concern; the current IUCN record is based on the 2021 assessment.

The subspecies is numerous and occupies an enormous seasonal range. Electrocution, poisoning, illegal killing and collisions with infrastructure can cause local mortality along migration routes, but there is no evidence that vulpinus itself qualifies for a threatened category. No separate global population estimate is available.