second calendar year: January - April

 

Last update of this page: 26-07-05 12:25

Normally, LBBG do not winter in the Netherlands, but depending on winter conditions some may stay in the most south-western point of our country at Westkapelle, Zeeland. Winter 2000-2001 was very mild so far, and a few tens remained at Westkapelle. Most LBBG present are believed to belong to the race intermedius originating from Denmark to Norway (Vest-Agder).
Nevertheless, some local Dutch graellsii -of the type 'Dutch intergrade'- may stay during winter as well, as Dutch colour-ringed individuals showed in winter 2000/2001 at Westkapelle and IJmuiden, near Amsterdam (see distribution maps for locations).
In many plumages, the on average darker intermedius are hard to distinguish from graellsii with certainty so unringed birds can maybe best called LBBG.
Most present LBBG in January are adults, but some sub-adults, first and second winters can be seen as well.

In spring, the large groups of LBBG that arrive, contains almost no 2cy birds. By March, adults (probably males) are the first to return to the colonies to occupy the best nesting sites. By the end of the month, just a few immature LBBG are seen. Throughout May, most 2cy LBBG can be found in large migrating flocks.

 

LBBG 5.412.154 2cy, February 10-18 2004, IJmuiden, the Netherlands (52.27N,04.33E). Upper scapulars and few coverts moulted to 2nd generation.
8595.jpg (45180 bytes)photo 1: LBBG 2cy, January 03 2002, Dannes, France (50.42N,1.34E). The upper scapulars have been moulted to second generation feathers, all other feathers are still juvenile.
8754.jpg (71416 bytes)photo 2: LBBG graellsii 2cy, January 04 2002, Le Portel, France (50.42N,1.34E). An individual missing the central and outer median coverts.
photo 3: LBBG 2cy, January 05, 2001, Westkapelle, the Netherlands.
2cy LBBG in March. (84697 bytes)photo 7: LBBG 2cy, March 05 2004, Amsterdam, the Netherlands. Picture by R. Altenburg.
2cy LBBG in April. (66422 bytes)photo 4: LBBG 2cy, April 19 2002, Le Portel, France (50.42N,1.34E).
lbbg2cy09627.jpg (64061 bytes)photo 5: LBBG 2cy, April 20 2002, Le Portel, France (50.42N,1.34E).
lbbgsubad09619.jpg (65378 bytes)photo 6: LBBG group immatures, April 20 2002, Le Portel, France (50.42N,1.34E).