Fig. 1

Distribution of the 84 studied larval sites. The sites have been grouped into six main classes according to their typology (see text): Human made (red), Ricefield (green), Niger River (blue), Kori (light blue), Pond (pink) and very small sites (yellow). The background is extracted from a satellite image of LANDSAT ETM+ band 8, acquired on 2nd December 1999. The river is at a high water level