212 LAKII)^. 



birds the indications of a hood re-appear in autumn, soon after the 

 completion of the moult, which is in August ; but cold weather, com- 

 bined with a scarcity of nutritive food, arrests the development, and 

 it is not lisual to see birds with fully complete hoods till February, 

 though there are many exceptions. A female (by dissection) ob- 

 tained in the shore-nets at Wells, Norfolk, on Nov. 10th, has the under- 

 parts, and even the shafts and webs of the primaries, suffused with 

 a beautiful salmon-pink, but this also must be considered unusual. 



Nestling. Buffish to brown, darkest on the upper parts, spotted 

 and streaked with umber and black on the back, head, and throat. 



Young. Forehead white, rest of the head chiefly greyish brown ; 

 upper surface warmer brown, with grey lower wing-coverts ; 

 secondaries with blackish centres and white borders ; the three 

 outer primaries black on the outer webs and at the tips and margins 

 of the inner webs, but the centres white, except the outermost, in 

 which there is for a time a dark line inside the shaft (see cut) ; 

 in the succeeding primaries the dark colour increases ascendingly on 

 the inner webs, while from the 5th the outer webs are pale grey 



1 2 3 



Larus ridihundtis, jut. 



to brownish, with a little white at the tips ; tail-feathers white, 

 with a band of blackish brown ; under surface duU white : bill dull 

 yellow, passing into black at the angle ; tarsi and toes dull reddish 

 yellow. The brown colour is soon lost on the back, which has 

 become grey by December. 



Immature. Like the adult, with a few brown markings left on 



