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NESTING-SERIES OF BRITISH BIRDS. 183 
east coast of Scotland and some colonies may be found on the islets in 
lochs. It generally nests in company with others of its kind and often 
among colonies of the Lesser Black-backed and Common Gulls. Like 
other large Gulls it is a great robber of eggs and young birds. Three 
is the full number of eggs laid. 
Nairnshire, 6th of June. 
Presented by W. R. Ogilvie-Grant & H. S. Reid, Esqrs. 
No. 125. GLAUCOUS GULL. (Larus glaucus.) 
Although this cireumpolar bird is an irregular winter visitor to our 
shores, it has never been known to breed in the British Islands, its 
nesting-places being in the Arctic Ocean on the shores of both 
continents. Its habits, food, and mode of nesting are similar to those 
of the Great Black-backed Gull. The stone-coloured eggs, spotted 
with ash-grey and brown, are laid during the first half of June and are 
usually three in number. 
Waigats Island, July. 
Presented by H. J. Pearson, Esq. 
No. 126. SANDWICH TERN. (Sterna cantiaca.) 
A regular visitor to the British Islands, arriving in March and April, 
and returning south early in autumn. It nests in colonies, associating 
with Arctic or Common Terns, and not infrequently changes its 
breeding-grounds when persecuted. ‘The nest is generally a shallow 
hole scratched in the shingle or in the sand among sea-campion, sorrel, 
and other plants, but sometimes a tolerably solid structure of beuts may 
be seen. The eggs are usually two, rarely three, in number, and 
vary much in colour and markings. 
Scotland, 10th of June. 
Presented by Captain S. G. Reid & W. R. Ogilvie-Grant, Esq. 
No. 127. ROSEATE TERN. (Sterna dougalli.) 
This southern species visits the British Islands regularly in small 
numbers, arriving at the end of April and leaving as soon as the young 
are able to fly. It is generally met with im small colonies of one or 
two pairs associating with Arctic or Common Terns. The eggs, two or 
three in number, are laid on the ground and are almost indistinguishable 
from those of the above-mentioned allied species. 
Scotland, 11th of June. 
Presented by Captain 8S, G. Reid & W. R. Ogilvie-Grant, Esq. 
