24a 
BIRDS. 
lacrymans or TI. ringvia) is in proportion to the others as 
one or two in every ten or a dozen. The identity of those 
forms has been placed by us beyond doubt. The regularity 
of the migration from east to west in autumn at all the 
north coast lighthouses, and the dates of commencement 
and completion, are interesting (see Migration Keports, 
1879-1883). 
Caithness name — "- Awpie." Very common, and breeding in 
all suitable localities along the coast-line, a few birds 
being seen off the coast in winter. The ringed variety is 
also common on the east coast (0. MSS., 1868). 
WoUey, in 1849, says: "I calculated" the percentage 
of bridled birds amongst the common variety " at almost 
one in five or six. This happened at Holborn Head, on 
■ the Cleat, on April 22d, 1849. There was a large assemblage 
on the level ground on the top of that stack, a cluster of 
some hundreds apparently closely huddled together " (Woll. 
E.-B., vol. iii. p. 333). In 1885 Harvie-Brown saw the 
same large colony, but could not take stock of the bridled 
birds so as to be able to count them, as their heads were 
only visible over the grasses, and were constantly moving. 
He tried in vain, but gave it up. In 1880 Mr. George 
M'Lauchlan, at that time lighthouse-keeper at Dunnet 
Head, estimated the number of guillemots hatched out at 
Dunnet Head at about 350 ; and he adds : " I can count 
175 bridled ones in say 350 !" Mr. M'Lauchlan has had, 
in his time, much experience of rock-bird stations — such 
as Barra Head, — so we consider his testimony worth pre- 
serving.^ 
369. Lomvia brunnichii, Sabine. Brunnich's Guillemot. 
[In Mr. Gray's Birds of the West of Scotland, p. 422, he says : 
" The late Mr. Wilson of Woodville, in his Voyage, men- 
Barra Head and its Bird Life. 
