40 



BLACK-AND-WHITE BIRDS. 



TERNS -White sea-birds ^vith black caps, gray backs, and 

 deeply forked tail. ; but because white in all oth^r parts des;ribed 

 under '\\hiteSea-Birds.' 



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

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

 except the gray wings, described under 'White Sea-Bipds ' 



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 win-s 

 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- 

 wrfe 'Diving Ducks.' 



GREAT NORTHERN DIVER. -A SSinch nuarine diver, with 

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

 collars, the upper parts variegated with black and white, an.l 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, an.l wings mixed black and white. 

 Being duck-hke m form, it has been described under 'Duck like 

 Diving Birds.' 



