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Table 5.25. Lesser black-backed gullmonthlymean abundance estimates (includes positively identified and proportioned out individuals) and monthly mean densities from aerial survey data within the East Anglia THREE Site only.
Survey Month
January February March April May June July August September October November December
Lesser black-backed gull is a species for which an overlapping occurrence of passage birds and more local breeding birds had been noted from an examination of the monthly occurrence of the data. The biological mean peak abundance estimates contain an apportionment to account for this overlap, though monthly mean peak estimates for this species before this apportioning across bio-seasons is contained in Appendix B.