Thus we see that as with the wing, so with the bill,—each bird is furnished with the kind that is most suitable to its nature and habits.
The general law of adaptability to its purpose is also strikingly exemplified in the formation of the foot. Let us look at Plate X.
1. The foot of the Fieldlark has a spur-like nail on the back toe which is nearly straight, so that the bird can easily rest on the ground.
2. The Pheasant’s foot is just like that of the Hen; which enables it to walk and run.
3. The powerful, sharp claw of the Eagle strikes deeply into the flesh of its prey and holds it fast.
