Lesser Swamp Warbler (Acrocephalus gracilirostris parvus)

Lesser Swamp Warblers are small, 6" (15cm) birds, with rufous-brown upperparts that are brighter on the rump. Grey cheeks, with a white throat. Darker grey breast and white-ish underparts with a red wash on the flanks. The bill is dark brown, with pink-ish, dark yellow or grey at the base of the bottom mandible. An orange gape. Eyes are brown. Long, dark brown tail, typical of Warblers. Legs & feet are black.

Lesser Swamp Warblers are seen singly or in pairs and are mongamus (pair for life) and build their nests amongst reeds, made from local materials and lined with grass. The nest is deep and cup-shaped. Usually, 3 eggs are laid and incubated by both parents for 14 days. The chicks fledge within a further 14 days.

Lesser Swamp Warblers eat insects, butterflies, moths and other small invertebrates. On occasion, they also take small frogs. Most food is taken from near the water level, foraging in the vegetation.

Lesser Swamp Warblers are residents and commonly seen in west and central Kenya highlands. Eldoret, Kapsabet (and other Nandi districts), Lake Baringo, Naivasha and Nairobi are the main areas for this sub-species (A. g. parvus). Another sub-species (A. g. jacksoni) are seen on the islands and shores of Lake Victoria. And the third sub-species (A. g. leptorhynchus) are seen at the coast and along the lower Tana River, Amboseli and east to Kibwezi.
Mostly seen around perimeters of waterlands, particularly in tall marsh vegetation & lakeshore shrubbery.

Extra Lesser Swamp Warbler Facts
Lesser Swamp Warblers have an enchanting song "sskio~chee~trreeeweeeoowoo~chee~chee".

Photographed at Kenya's Nairobi National Park.

Categories & Keywords
Subcategory Detail:
Keywords:bird, kenya, lesser swamp warbler, warbler, wildlife

Lesser Swamp Warbler ~ On Reeds

Lesser Swamp Warbler perched on reeds, over water.

Lesser Swamp Warbler ~ On Bamboo

A Lesser Swamp Warbler, perched on bamboo beside Hyena Dam in Kenya's Nairobi National Park.