(12 PICTS: 13-24)
1B
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
13 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
14 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam.The Netherlands
15 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam.The Netherlands
16 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
17 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
18 Black-headed Gull Larus ridibundus 2CY 04052007 Stellendam, The Netherlands
19 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
20 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
21 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
22 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
23 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
24 Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam,The Netherlands
| blackheaded gulls | |||||
| 1A | 1B | 1C | 1D | 1E | 1F |
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| 12 | 24 | 36 | 48 | 61 | 67 |
23 feb 2009