Fig. 1. Insect-eating bill of Robin ; 2. Seed-cinshing- bill of a Sparrow ; 

 3. Snapping bill of Whippoorwill : 4. Needle bill of Hunimingbinl : ">. Chis- 

 elling bill of Woodpecker: 6. Climbing bill of Paroquet ; 7. Tearing bill of 

 Falcon; 8. Grooveil drinking bill of Dove; 9. Gleaning bill of Ruffed 

 Grouse; 10. Wedge bill of Plover ; 11. Straight probing bill of Snii)e. 



