• Summary
• Text account
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• Map
• Reference and further resources

Site description (2001 baseline)
Tchérassa reservoir, also known as Tyéra(s)sa, is a permanent reservoir which takes its name from the nearby village, located 6 km north-east of the town of Birni N’Konni in southern Niger. It is filled by surface run-off and is used as a source of water for irrigation during the dry season. Average annual rainfall during the period 1961–1990 in the Birni N’Konni area was approximately 450 mm. However, rainfall totals vary considerably from year to year, which affects the size of the wetland (65–125 ha at the times of the waterbird censuses). The water of the wetland is brackish, alkaline and low in nutrients.

Key biodiversity
See Box for key species. The only thorough count of the Bubulcus ibis roost, which lies immediately downstream of the dam in a stand of Acacia nilotica, dates from 1994. According to local inhabitants, the roost had then been in use for a number of years. The total number of waterbirds counted in 1994 was 18,025. Other significant observations, in addition to those listed below, include 2,100 Dendrocygna viduata in January 1995. Two Circus macrourus were reported in February 1998.

Non-bird biodiversity: None known to BirdLife International.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tchérassa reservoir (Niger). Downloaded from https://datazone.birdlife.org/site/factsheet/tchérassa-reservoir-iba-niger on 23/11/2024.