Southern white-faced owl

The Southern white-faced owl, scientifically known as Ptilopsis granti, is a small owl species native to the southern half of Africa. It is a member of the Strigidae family and inhabits open country, specifically savannas and dry woodlands. This owl was once considered a subspecies of the northern white-faced owl but is now commonly recognized as a distinct species.

Description and Characteristics

This owl typically measures between 22 and 28 centimeters in length. Its plumage features grey upperparts marked with dark streaks, and white spots on the scapular feathers. The underparts are whitish, also streaked with dark patterns. A striking facial feature is the white face, accentuated by a black border and framing large, bright orange eyes. Two short ear-tufts with black tips adorn its head, and juvenile birds have a noticeably grayish face.

Distribution and Habitat

The Southern white-faced owl has a patchy distribution across western, central, and southern Africa. It can be found in countries such as Gabon, the Republic of Congo, the Democratic Republic of the Congo, and Angola. More commonly, it is observed in regions including Uganda, southern Kenya, Tanzania, Zambia, Namibia, Botswana, Zimbabwe, Mozambique, Eswatini, and the northern parts of South Africa. Its preferred habitats are savannas and dry woodlands, where it is generally seen alone or in pairs.

Diet and Vocalization

The primary food source for the Southern white-faced owl consists of large insects. However, its diet is supplemented by occasional small mammals, birds, and reptiles. The owl's vocalization is distinctive, characterized by a series of fast, bubbling hoots that are typically uttered at night and frequently repeated. During the breeding season, pairs often engage in vocal duets, producing sequences of staccato notes followed by a longer, higher-pitched hoot.

Nesting and Reproduction

Nesting for this species usually occurs in the abandoned nests of other birds. A clutch typically consists of two to three eggs, which undergo incubation for approximately 30 days. The young owls fledge and leave the nest about a month after hatching.

Adaptability

An interesting aspect of the Southern white-faced owl's biology is its remarkable temperature adaptability. Following the summer months, the owl increases its resting metabolic rate by around 45% to cope with climate changes and enhance its tolerance to cold. Furthermore, its basal metabolic rate is lower than expected for birds of its size, which is advantageous for survival during periods of food scarcity, particularly in winter.