Wading foot of Golden Plover, with only three toes; 7.

Wading foot of Snipe, with short hind toe; 8.

Wading foot of Green Heron, with long hind toe; 9.
Swimming foot of Coot, with lobed toes; 10.

Swimming foot of Canada Goose, with three toes webbed; 11.

Swimming foot of Cormorant, with all four toes webbed.] "It's the heel in people, but I should think the hind toe of a bird was its heel," said Nat doubtfully, and beginning to think he did not understand.
"You might think so," said the Doctor; "but you would be wrong.