40 BLACK-AND-WHITE BIRDS. 



TERNS. White sea-birds with black caps, gray backs, and 

 deeply forked tails ; but because white in all other parts described 

 under 'WHITE SEA-BiRDS.' 



BLACK-HEADED GULL. 16 inches. A gull with head en- 

 tirely black in summer ; but because white in all other parts 

 except the gray wings, described under 'WHITE SEA-BiKDS.' 



LESSER BLACK-BACKED GULL. 22 inches. A sea-gull, 

 black on back and wings ; but because white in all other parts, 

 described under 'WHITE SEA-BiRDS.' 



GREAT BLACK-BACKED GULL. 30 inches. As the pre- 

 ceding bird. 



BLACK GROUSE. 15-22 inches. The male is black, with 

 large divided tail and red wattle, but white beneath the wings 

 and the root of the tail ; it has also a white wing-bar. A percher 

 in woods in Scotland and north of England, but feeding on moors 

 and in stubbles. See under ' GROUSE.' 



TUFTED DUCK. A black diving duck with a white patch 

 on the wing, and the sides and under parts of the body white : 

 vide ' DIVING DUCKS. ' 



GREAT NORTHERN DIVER. A 33-inch marine diver, with 

 head and long neck black, the latter with two white-streaked 

 collars, the upper parts variegated with black and white, and the 

 under parts white. Being duck-like in form, it has been described 

 under ' DUCK-LIKE DIVING BIRDS.' 



SMEW. A 17-inch marine diver, mostly white, but with face, 

 hind-head, and back black, and wings mixed black and white. 

 Being duck-like in form, it has been described under ' DUCK-LIKE 

 DIVING BIRDS.' 



