February 2000 – vol. 93, issue 2, pp 94–101 Syroechkovski et al. (1998) have recently published the results of a study of Brent Geese Branta bernicla in northwest Yakutia, Russia. They claimed to have located a previously unknown contact zone of Dark-bellied Brent Goose Branta (b.) bernicla and Black Brant B. (b.) nigricans. If valid, these observations would be significant because they would provide the first documentation of the interacti... This article is only available to registered users.To read more, please log in or purchase a subscription.