The young eider, which has now grown much bigger, has been moved into a larger aviary along with several mute swan cygnets.
Photos of the eider on the Berwick Swan Trust's Facebook page can be found here:
Eider duck photo from Berwick Swan Trust
Lindisfarne NNR is a great place to see young eider 'creches' at the minute, as you are driving across the Holy Island causeway's bridge watch for groups of ducklings with adult females swimming and roosting at the edge of the channel.
Female eider duck with part of a creche