Hanby, A. M / April 1986 – vol. 79, issue 4, pp 205–209 Juvenile-plumaged Great Crested Grebe in spring. From 27th April to 10th May 1984, a Great Crested Grebe Podiceps cristatus present at Llanishen and Lisvane Reservoirs, South Glamorgan, was in juvenile plumage, showing the characteristic black-and-white head and neck pattern of that age (see fig. 1). PHILLIP BRISTOW and NIGEL ODIN. Bewick's Swan with yellow legs On 1st January 1984, among a... This article is only available to registered users.To read more, please log in or purchase a subscription.