September 2002 – vol. 95, issue 9, pp 449–453 When evaluating records of non-passerine species, it is relatively commonplace for BBRC to review details of moult as part of the assessment process. The amount of published information on the timing and variability of moult tends to be limited, however, and a bird that displays features which are poorly documented may be a trap for the unwary. Most autumn records of young White-winged Black Terns... This article is only available to registered users.To read more, please log in or purchase a subscription.