This content requires Adobe Flash Player version
or later.
Either you do not have Adobe Flash Player installed,
or your version is too old,
or there is a problem with your Flash installation and we were unable to detect it.
Table 5.32. Flight height summary of herring gulls recorded in flight from monthly aerial surveys across the East Anglia THREE Site and 4 km buffer.
Total Herring gull
325 99.
Sitting birds
275
Total flying
50
Below PCH
40
Flying birds At PCH
(22-176 m) 10
Above PCH (176 m+)
0
% Flying at PCH
20
The flight direction recorded for this species was notably in a southerly direction during the autumn passage season, Figure 5.9, suggesting a southwesterly autumn movement towards the English Channel, away from colonies in the North Sea.
Figure 5.9 Summary of herring gulls flight direction within the East Anglia THREE Site and 4 km buffer during the September, October and November surveys (n=6).
100. Spatial distribution maps are provided in Appendix H for each bio-season, though herring gull showed no patterns or preference to specific areas within East Anglia THREE site or its 4km buffer.
5.3.18 Great Black-backed Gull
5.3.18.1 Abundance estimates 101. Great black-backed gulls were recorded during all surveys with the exception of June, August and October 2012 and March, May, June and July 2013 surveys (Table