African Skimmer

The African Skimmer is a graceful, ternlike bird found along the major rivers and lakes of sub-Saharan Africa, sharing the distinctive elongated-lower-mandible bill shape of its skimmer relatives. It is more slender and lighter-built than the Black Skimmer of the Americas.

Appearance

Adults have blackish upperparts, white underparts and forehead, and a long, thin bill that is bright orange at the base fading to yellow toward a black tip, with the lower mandible longer than the upper. The legs are orange-red and relatively short.

Key field marks

• Long, thin bill with a longer lower mandible, orange fading to a black tip
• Slim build with long, pointed wings
• Black upperparts, white underparts and forehead
• Low, gliding flight just above the water surface

Similar species

No other African bird shares the unique skimmer bill shape, making it unmistakable within its range. It is more slender than the Black Skimmer of the Americas and the Indian Skimmer of South Asia, and its bill coloration (mostly orange rather than red with a sharp black tip) helps distinguish it from those relatives where ranges might be discussed together.

Habitat and range

African Skimmers are found along large, slow-flowing rivers, lakes, and associated sandbanks and sandbars across sub-Saharan Africa, from West Africa through the Nile and Rift Valley systems to southern Africa. They depend heavily on exposed sandbars for nesting and roosting.

Migration

The species is largely sedentary or makes local movements tied to water levels, often shifting between rivers and lakes as sandbar availability changes with seasonal flooding. Habitat alteration from dam construction and changing river flow patterns threatens nesting sites in parts of its range.

Behavior

African Skimmers feed by flying low over calm river or lake surfaces with the lower mandible cutting through the water, snapping shut on contact with a fish, typically feeding in the cooler hours of early morning and late afternoon.

Voice

Calls include sharp, tern-like barking notes, given especially in flight or when disturbed near nesting sandbars.

Nesting and breeding

They nest colonially on bare sandbars and sandbanks exposed during the dry season, laying two to three eggs directly on the sand. Nesting success is closely tied to river water levels, since rising water can flood colonies before chicks fledge.