Rooster
A Frog
Frog
tadpoles
Gorilla
chimpanzee
Head of Orang-Utan
Hand of Gorilla, Orang, Gibbon, and Chimpanzee
Female Stickleback about to Enter Nest
Male Stickleback Watching Eggs in Nest
Female Stickleback Laying Eggs in Nest
Trout
Centipede
Chrysalis of Tomato Worm
The Surinam Toad
Pouched Frog
Chinch Bug
Thirteen-Spotted Lady Beetle
A Lamprey
Turtle
Chipmunk
Nest of the Chicadee
A Wolf
Baltimore Oriole and Nest
Nest of Red-eyed Vireo
Nest of Phœbe
Bat
Sleeping Bat
Long-eared Sunfish
Rainbow Darter
King Snake
The Caterpillar of the Eyed Hawk-Moth (Smerinthus ocellatus)
The Caterpillar of the Marbled White Butterfly (Arge galathea)
The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Fifth Stage
The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Full grown
The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Fourth Stage
The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Just before the second moult.
The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Third Stage
The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Second Stage
The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). First stage
The Caterpillar of the Small Elephant Hawk-moth (Chærocampa porcellus)