A lack of gulls

There seems to have been a clear out of Black Headed and Common gulls and an influx of Lesser Black Backs recently. The congregations of gulls on the freshwater outflows along the coastroad are  much reduced but are holding more L.B.B Gulls.

Newbiggin
14 Greater Black Backs
40 Lesser Black Backs
50 Herring
40 Common
20 Black Headed
16 Pintail
20 Wigeon
2 Great Crested Grebe
120 Knot

Cavendish Dock
12 Brent Geese (light bellied)
30 Wigeon
102 Cormorant
30 Ringed Plover
60 Knot
2 Little Egret
1 Kingfisher
1 Cockatiel sp