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The influence of vegetation height and cover on breeding ecology of Yellow-legged gulls (Larus michahellis) nesting in the Islands of Oued Charef dam, northeastern Algeria, was investigated. The effects of habitat characteristics (vegetation height, cover) and nest features on breeding parameters (nests and eggs characteristics, clutch size and nesting success) of 40 nests recorded on the center of island were analyzed using Pearson correlation test. The present nesting distribution of the Yellow-legged gull in the small island of Oued Charef dam indicate an influence of vegetation height and cover on clutch size and chick productivity (chick survived and hatching). Egg-laying started in early January and continued to early June. Pearson correlation analysis revealed that increasing egg laying day was positively correlated with number of active nests. Hatching success was relatively lower compared with studies carried out in northeastern Algeria and an average of 1.5 chicks survived to 20 days. Clutch size averaged 3.9 ± 0.3 (195 eggs), (range: 1-4 eggs) with 79.2% hatching success. Our results provide new insights into some of the habitat parameters that affect the nest selection and breeding success of the target species. [ABSTRACT FROM AUTHOR]