1f-blackheaded gulls

(11 PICTS: 62-66)

1F 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

62 Black-headed Gulls Larus ridibundus 2CY 10052007 Stellendam, The Netherlands

63 Black-headed Gulls Larus ridibundus 2CY 10052007 Stellendam, The Netherlands

64 Black-headed Gulls Larus ridibundus 2CY 10052007 Stellendam, The Netherlands

65 Black-headed Gulls Larus ridibundus 2CY 12052007 Stellendam, The Netherlands

66 Black-headed Gull Larus ridibundus 2CY 1704200 Stellendam, The Netherlands

67 - Black-headed Gull Larus ridibundus 2CY 21-05-2007 Rozenburg, The Netherlands. This bird was ringed as a chick on 10-06-2006
near Braslav, Vitebsk region, BELARUS (BY28, former SU28) 55.38'N 27.02'E, distance 1545 km.

--never never never mount a ring upsidedown, even when the bird is not very cooperative!--

68 Black-headed Gull 2CY renewing primaries & wing coverts 13062007 Stellendam, The Netherlands

71 Black-headed Gull pair 16062007 The Hague, The Netherlands

72 Black-headed Gulls displaying 16th June 2007 The Hague, The Netherlands

Small gulls overview	blackheaded gulls						bonaparte'sgulls
	1A	1B	1C	1D	1E	1F
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	12	24	36	48	61	67