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5.33). Numbers peaked during January 2013 when an estimated 1,035 (136- 2,207) individuals were present within the East Anglia THREE site. Monthly abundance estimates for the East Anglia THREE site with a 4km buffer are presented in Appendix C, as is the raw count data and confidence limits for the monthly abundance estimates. The abundance estimates below provide information on this species after there has been the process carried out of the attribution of unidentified birds, the process of attribution being described in the methods section. Appendix B provides the abundance estimates for this species before the attribution of unidentified birds and also the abundance estimates for the relevant unidentified, grouped category.
Table 5.33. Great 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