ZOOLOGY. 73 



The Keel-Bills feed like the preceeding; are generally 

 met with in small flocks ; aad mostly inhabit South America. 



9. Glaucopis. Wattle-Bird. Bill incurvated, arched, the 



lower mandible shorter ; carunculated beneath the 

 base ; nostrils depressed, half-covered with a subcarti- 

 laginous membrane ; tongue subcartilaglnous, divided 

 and fringed at the tip; feet formed for walking. 



A native of New Zealand, feeding on seeds, fruit, insects, 

 Rnd small birds ; inhabit thickets, but is most usually seen 

 on the ground. 



10. Corvus. Croat. Bill conve/Xy strong, edges cultrated ; 

 most species have a notch near the tip; nostrils covered 

 with setaceous recumbent feathers ; tongue cartilagi- 

 nues, bifid ; feet formed for walking. 



Some species of this genus is to he found in almost every 

 country, their habits are similar, feeding on fruit, grain, 

 worms, insects, small birds, and carrion ; most of the kinds 

 are gregarious, some build in large communities, as the Rook • 

 their nests are mostly placed on trees, clefts hi rocks, old 

 ruined buildings, lofty towers and steeples. They are a 

 crafty tribe; of familiar manners, easily tamed, and particu- 

 larly addicted to the pilfering of glittering substances. 

 Eight species are natives of Britain. (See British Ornilho- 

 logy, vols. 1, 2.) 



11. Coriacias. Roller, ^///sharp-edged, bent in at tlie 

 point, naked at the base ; nostrils narrow, naked ; 



