Fig. 3 in Ecology Of Avian Settlements In Lake Tonga (Northeast Algeria)

Fig. 3. Evolution of the specific richness of waterbirds at Lake Tonga. common coot is by far the most abundant. The purple swamphen Porphyrio porphyrio is also included in the IUCN Red List and therefore we can say that Lake Tonga is a very important site for waterbirds in our country (Boumezbeur, 1993; Benyacoub et al., 2011). It should be noted that Lake Tonga is the only nesting site of the Whiskered Tern Chlidonias hybrida in Algeria and North Africa (Bakaria et al., 2009).