gustard

— As a resident species it appears to have been entirely confined to Berwickshire; it is thus referred to by Hector Boece, who flourished about 350 years ago :--'Besides these, we have another foule in Mers, more strange and uncouth than all these aforementioned, called a Gustard, fully so great as a Swan, but in colour of feathers and tast of flesh little differing from a Partridge'.