PLATE XLI. 
W. D. Latimer, Photo. | Fig. il, 
BLACK-HEADED GULLS. 
A. B. C. dD. 
Winter plumage Nuptial plumage Autumn plumage Winter plumage 
(Immature). (Mature). (Immature). (Mature). 
Specimens B, C, D, collected and mounted by the-late Mr, E. Williams, 
= 
E. Williams, Photo.] Fie, 2 
THE LAKH, ST. STEPHEN’S GREEN, DUBLIN. 
Among the pinioned water-fowl are to be seen a number of Black-headed Gulls, in 
winter plumage, which have taken up their abode on the lake, 
