|Location||Kenya, Western Province|
|Central coordinates||34o 1.00' East 0o 14.00' North|
|IBA criteria||A1, A3|
|Year of IBA assessment||2001|
Ornithological information See Box and Table 3 for key species. This is an important site for Lake Victoria biome species, especially three papyrus endemics: Laniarius mufumbiri (relatively common), Bradypterus carpalis and Serinus koliensis. The globally threatened Chloropeta gracilirostris is not yet recorded but is likely to occur.
Site description This site is a papyrus Cyperus papyrus swamp at the extreme north of the Kenyan section of Lake Victoria, on the Kenya/Uganda border. The site consists of mature, almost undisturbed, continuous papyrus stands, stretching from the mouth of the Sio river southwards for about 3.5 km along the lakeshore.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Papyrus Gonolek Laniarius mufumbiri||resident||1999||present [units unknown]||-||A1, A3||Near Threatened|
|Carruthers's Cisticola Cisticola carruthersi||resident||1999||present [units unknown]||-||A3||Least Concern|
|White-winged Scrub-warbler Bradypterus carpalis||resident||1999||present [units unknown]||-||A3||Least Concern|
|Sharpe's Pied-babbler Turdoides sharpei||resident||1999||present [units unknown]||-||A3||Least Concern|
|Red-chested Sunbird Nectarinia erythrocerca||resident||1999||present [units unknown]||-||A3||Least Concern|
|Northern Brown-throated Weaver Ploceus castanops||resident||1999||present [units unknown]||-||A3||Least Concern|
|Papyrus Canary Serinus koliensis||resident||1999||present [units unknown]||-||A3||Least Concern|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Wetlands (inland)||Permanent herbaceous swamps and bogs||100%|
|Land-use||Extent (% of site)|
|Notes: cutting of papyrus|
Other biodiversity None known to BirdLife International.
Management considerations Sio Port is an important site because of the size of the swamp and its relatively pristine condition. Like other papyrus swamps around Lake Victoria, it is increasingly threatened by unsustainable use, and is in urgent need of better protection. Infestation by the exotic water-hyacinth Eichhornia crassipes in many parts of the lake has prevented fishermen from fishing, forcing them to seek alternative forms of livelihood and adding greatly to the human pressure on wetlands. Papyrus shows remarkable powers of regeneration, but excessive cutting for the local mat-making industry, combined with large-scale clearing for cultivating rice and other crops, could rapidly destroy this wetland. Further survey work needs to be carried out at Sio Port to establish whether the threatened Chloropeta gracilirostris is present, and if so, at what densities.
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Sio Port swamp. Downloaded from http://www.birdlife.org on 24/05/2013
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