172 BRITISH BIRDS. 



dusky on the outer sides, and pale blue on the 

 inner sides and shins: the toes and webbed mem- 

 branes are also blue on the upper sides, and dark 

 underneath. 



This description was taken from a very perfect 

 bird, caught on Sand Hutton Car, near York, on 

 the 28th of January, 1799, by the Rev. C. Rudston: 

 'other specimens have differed in the shades of their 

 plumage and colour of the bill : in some the upper 

 mandible is yellow, from the nostrils to the corners 

 of the mouth, and the under one entirely of that 

 colour. 



