116 The birds of Pembrokeshire. 
it has a red throat, and the top of the head and sides of the 
neck are bluish grey, with white and black lines running down 
the back of the neck, and on the back the white spots of the 
winter dress have become so small as almost to have disappeared. 
Our own acquaintance with the various Divers was made in the 
estuaries of Devonshire, where we have occasionally seen the 
Red-Throated Diver in flocks of a dozen or more. Writing 
from Aberystwyth, Mr. J. H. Salter informs us that on April sth, 
1893, he observed Red-Throated Divers passing northwards, 
and that he had nearly twenty in sight at once. 
GREAT CRESTED GREBE, Podiceps cristatus——A winter visitor. 
Not very common in Pembrokeshire. Sir Hugh Owen has seen 
it at Goodwick. Mr. Dix says: ‘* A few are seen during the 
winter, but invariably in immature or winter plumage.” How- 
ever, Sir Hugh Owen appears to have met with it in its adult 
dress, as he informs us he has seen both the Great Crested and 
the Tippet Grebes, the latter being the common name of the bird 
in its full plumage. 
RED-NECKED GREBE, Podiceps grisezgena.—A winter visitor ; 
rare. Mr, Dix was informed by Mr. Tracy that he had several 
times killed examples of the Red-Necked Grebe, the rarest 
member of the family in the south west of England, on the mill- 
pond at Pembroke. This species is not included by Mr. 
Mathias. 
SCLAYONIAN GREBE, Podiceps auritus——A winter visitor ; rare. 
According to Mr. Dix a few specimens of this Grebe occur every 
winter in their immature or winter plumage. Mr. Mathias 
omits it from his list. It used to be the commonest of all the 
Grebes in the winter time on the North Devon rivers, where we 
have frequently shot it, and have sometimes seen three or four 
of a day. It is thus likely to occur on the Pembrokeshire side 
of the Bristol Channel. It is a much smaller species than either 
the Great Crested Grebe or the Red-necked Grebe. 
