Aves, p�le ornithologique de Natagora

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Aves, 25/2 | 1988 | 107-115

  Migration phenology and regional status of the Lesser Black-backed Gull (Larus fuscus) - Continuous onservation of a dormitory and comparison with the Great Black-backed Gull (Larus marinus).
Languy, M. & Coquette, P.

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Article summary

A dormitory of Lesser Black-backed Gulls (Larus fuscus), in the west of Hainaut, was observed from 1983 to 1987 on weekly basis. The resulting observations, together with information given in appropriate literature, reveal the distinct difference existing between the Lesser Black-backed Gull and the Grat Black-backed Gull (Larus marinus) as far as migration phenology is concerned, and their status in the Walloon Country. Whilst the Great Black-backed Gull appears essentially in the depths of winter, the Lesser Black-backed Gull is principally observed during the Autumn migration. The Lesser Black-backed Gull proved to be susceptible to prevailing winds, as an influx of birds was recorded at Gaurain-Ramecroix dormitory during west or north-west winds; Finally, since 1983, a great increase was noticed in the number of Lesser Black-backed Gulls, both wintering and migratory, frequenting the dormitory.

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