Mediterranean Gull (Larus melanocephalus) Science Article 6
abstract
Since 1981, when the first breeding pair of Mediterranean Gull Larus melanocephalus was recorded in Poland, the population of this gull has increased considerably. Its population size was stable until 1997, not exceeding ten pairs annually
Monika Zielinska et al, J Ornithol (2007) 148:543-548