BIRDS OF DURHAM AND VICINITY. 
105 
Lams atricilla. Laughing Gull. 58. 
The Laughing Gull ought to be seen here in summer, though I have 
found no trace of it. In size it is like the Kittiwake, and its black 
head will reveal its identit}- a long way off. 
Xema sabinii. Sabl\e's Gull. 63. 
This Gull is a resident of the Arctic regions that is occasionally 
seen spring and fall at least as far south as Long Island. It is as 
small as Bonaparte's Gull, but is distinguished by a forked tail, which 
is incised to the extent of about an inch. 
Gelochelidon nilotica. Gulled-billed Tern. 63. 
This is a'southern bird that rarely strays to New England. It has 
been killed at least as far north as Grand Menan. 
Sterna forsteri. Forster's Tern. 69. 
This tern is only a possibility, as at this latitude it is chiefly con- 
fined to the interior of the continent. One or two have been taken on 
the Massachusetts coast. 
Sterna paradissea. Arctic Tern. 71. 
Although I have been unable to find an Arctic Tern, or anybody who 
had ever seen one, it is surely due to a lack of proper scrutiny on the 
part of the observers, as that tern must be found along the coast. In 
size it is a little less than the Common Tern, though its tail is longer. 
Its bill is carmine throughout. 
Sterna doug-alli. Roseate Tern. 72. 
The Roseate Tern is of casual occurrence north of Cape Cod, but 
the Maine coast is sometimes visited by it, and undoubtedly ours is. 
Its bill is black, except for a little orange at the base. 
Hydrochelidon nigra surinamensis. Black Tern. 77. 
It is unlikely that this tern will be found here, perhaps, yet it has 
occurred in Maine and Massachusetts as a rare spring and fall migrant. 
It is an inhabitant of the interior and western portions of America. 
Rynchops nig-ra. Black Sklmmer. 80. 
The Skimmer must be an occasional passer oft' shore, as it is now 
and then reported from Maine, though it is uncommon north of New 
Jersey. 
