ABSTRACT In recent winters, several examples of apparent intergrades between dark-bellied Brent Geese Branta bernicla bernicla and `Black Brants' B. b. nigricans have been documented in Britain and elsewhere in Europe. A bird in Norfolk during 1998/99 and 1999/2000, and thought perhaps to be an intergrade, showed a suite of features which were generally consistent with nigricans: only the neck collar


Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now