(12 PICTS: 49-61)
1E
Black-headed Gull Larus
ridibundus
Black-headed Gulls are very common in the Dutch delta in all months of the year.
The large colonies are a key element in the coastal ecosystem. Sandwich Terns f.i.
will only breed when there is a Black-headed Gull colony around and if so they will
settle in dense clusters amidst the gulls leaving the defence to the poor gulls which
will suffer great losses to marauding Herring and Lesser Black-backed Gulls.
Mediterranean Gulls, Barnacle Geese, Red-breasted Mergansers, Tufted Ducks and
Gadwalls very much depend on the protection of the Black-headeds and even Avocets
and Common Terns who can perfectly fend for themselves like the Black-headeds to
serve on the front line.
1-blackheadedgulls-
2-bonapartegulls-
3-mediterraneangulls-
4-littlegulls
5-franklin'sgulls
49 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
50 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
51 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
52 Black-headed Gull Larus ridibundus 2CY 12052007 Stellendam,The Netherlands
53 Black-headed Gull Larus ridibundus 2CY 12052007 Stellendam,The Netherlands
54 Black-headed Gull Larus ridibundus 2CY 12052007 Stellendam,The Netherlands
55 Black-headed Gull Larus ridibundus 2CY 12052007 Stellendam,The Netherlands
56 Black-headed Gull Larus ridibundus 2CY 12052007 Stellendam,The Netherlands
57 Black-headed Gull Larus ridibundus adult 10052007 Stellendam,The Netherlands
58 Black-headed Gulls Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
59 Black-headed Gulls Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
60 Black-headed Gulls Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
61 Black-headed Gulls Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
