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A genus of tropical birds classes with the climbers. The genus includes many beautiful species, most of them being distinguished by their brilliant and gaudy plumage. They have a hooked bill and live largely in trees, in which the bill aids them in climbing.

Parrot

A genus of tropical birds classes with the climbers. The genus includes many beautiful species, most…

A genus of sea-birds. They include many species, all of which have webbed feet and long and strong wings. The nasal tubes are united, the beak is as long as the head, and the upper mandible is hooked. They live almost constantly on the ocean.

Petrel

A genus of sea-birds. They include many species, all of which have webbed feet and long and strong wings.…

The general name of certain genera of carnivorous mammals, havin feet adapted for swimming, and being able to live both in and out of water.

Seal

The general name of certain genera of carnivorous mammals, havin feet adapted for swimming, and being…

A class of reptiles belonging to the same order as the turtles, but differing from them mainly in that they frequent the land, marshes, and inland waters, while the turtles live principally in the sea.

Tortoise

A class of reptiles belonging to the same order as the turtles, but differing from them mainly in that…

The common name of animals belonging to the order cetacea, with which are included the porpoise and the dolphin. They are formed somewhat like fishes, and like them live in the sea.

Whale

The common name of animals belonging to the order cetacea, with which are included the porpoise and…

The peoples of South Africa and neighbouring Botswana and Namibia, who live in the Kalahari, are part of the Khoisan group and are related to the Khoikhoi.

Bushmen

The peoples of South Africa and neighbouring Botswana and Namibia, who live in the Kalahari, are part…

Aquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia.

Crocodile

Aquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia.

The platypus is a small, half-aquatic mammal endemic to the eastern part of Australia, and one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth to live young.

Platypus Skull

The platypus is a small, half-aquatic mammal endemic to the eastern part of Australia, and one of the…

Alligators live in freshwater environments, such as ponds, marshes, rivers, and swamps.

Alligator

Alligators live in freshwater environments, such as ponds, marshes, rivers, and swamps.

This illustration shows a worm. Worms have an elongated soft-body. The most famous is the earthworm, but there are hundreds of thousands of different species that live in a wide variety of habitats other than soil.

Worms

This illustration shows a worm. Worms have an elongated soft-body. The most famous is the earthworm,…

Amphipoda include over 7000 described species of small, shrimp-like crustaceans. Most amphipods are marine, although a few live in freshwater or are terrestrial.

Amphipod

Amphipoda include over 7000 described species of small, shrimp-like crustaceans. Most amphipods are…

A May fly. So called because however long they may live in the larva state, in their perfect form they exist only for a few hours to a few days, taking no food, but only propagating and then dying.

Day Fly

A May fly. So called because however long they may live in the larva state, in their perfect form they…

The official seal of the U.S. state of Alabama in 1889.

Alabama

The official seal of the U.S. state of Alabama in 1889.

The official seal of the U.S. state of Arkansas in 1889.

Arkansas

The official seal of the U.S. state of Arkansas in 1889.

The official seal of the U.S. state of California in 1889.

California

The official seal of the U.S. state of California in 1889.

The official seal of the U.S. state of Colorado in 1889.

Colorado

The official seal of the U.S. state of Colorado in 1889.

The official seal of the U.S. state of Connecticut in 1889.

Connecticut

The official seal of the U.S. state of Connecticut in 1889.

The official seal of the U.S. state of Delaware in 1889.

Delaware

The official seal of the U.S. state of Delaware in 1889.

The official seal of the U.S. state of Florida in 1889.

Florida

The official seal of the U.S. state of Florida in 1889.

The official seal of the U.S. state of Georgia in 1889.

Georgia

The official seal of the U.S. state of Georgia in 1889.

The official seal of the U.S. state of Illinois in 1889.

Illinois

The official seal of the U.S. state of Illinois in 1889.

The official seal of the U.S. state of Indiana in 1889.

Indiana

The official seal of the U.S. state of Indiana in 1889.

The official seal of the U.S. state of Iowa in 1889.

Iowa

The official seal of the U.S. state of Iowa in 1889.

The official seal of the U.S. state of Kansas in 1889.

Kansas

The official seal of the U.S. state of Kansas in 1889.

The official seal of the U.S. state of Kentucky in 1889.

Kentucky

The official seal of the U.S. state of Kentucky in 1889.

The official seal of the U.S. state of Louisiana in 1889.

Louisiana

The official seal of the U.S. state of Louisiana in 1889.

The official seal of the U.S. state of Maine in 1889.

Maine

The official seal of the U.S. state of Maine in 1889.

The official seal of the U.S. state of Maryland in 1889.

Maryland

The official seal of the U.S. state of Maryland in 1889.

The official seal of the U.S. state of Massachusetts in 1889.

Massachusetts

The official seal of the U.S. state of Massachusetts in 1889.

The official seal of the U.S. state of Michigan in 1889.

Michigan

The official seal of the U.S. state of Michigan in 1889.

The official seal of the U.S. state of Minnesota in 1889.

Minnesota

The official seal of the U.S. state of Minnesota in 1889.

The official seal of the U.S. state of Missouri in 1889.

Missouri

The official seal of the U.S. state of Missouri in 1889.

The official seal of the U.S. state of Nebraska in 1889.

Nebraska

The official seal of the U.S. state of Nebraska in 1889.

The official seal of the U.S. state of New Hampshire in 1889.

New Hampshire

The official seal of the U.S. state of New Hampshire in 1889.

The official seal of the U.S. state of New Jersey in 1889.

New Jersey

The official seal of the U.S. state of New Jersey in 1889.

The official seal of the U.S. state of New York in 1889.

New York

The official seal of the U.S. state of New York in 1889.

The official seal of the U.S. state of North Carolina in 1889.

North Carolina

The official seal of the U.S. state of North Carolina in 1889.

The official seal of the U.S. state of Ohio in 1889. Motto: Imperium in Imperio.

Ohio

The official seal of the U.S. state of Ohio in 1889. Motto: Imperium in Imperio.

The official seal of the U.S. state of Oregon in 1889.

Oregon

The official seal of the U.S. state of Oregon in 1889.

The official seal of the U.S. state of Pennsylvania in 1889.

Pennsylvania

The official seal of the U.S. state of Pennsylvania in 1889.

The official seal of the U.S. state of Rhode Island in 1889.

Rhode Island

The official seal of the U.S. state of Rhode Island in 1889.

The official seal of the U.S. state of South Carolina in 1889.

South Carolina

The official seal of the U.S. state of South Carolina in 1889.

The official seal of the U.S. state of Tennessee in 1889.

Tennessee

The official seal of the U.S. state of Tennessee in 1889.

The official seal of the U.S. state of Texas in 1889.

Texas

The official seal of the U.S. state of Texas in 1889.

The official seal of the U.S. state of Vermont in 1889.

Vermont

The official seal of the U.S. state of Vermont in 1889.

The official seal of the U.S. state of Virginia in 1889.

Virginia

The official seal of the U.S. state of Virginia in 1889.

The official seal of the U.S. state of West Virginia in 1889.

West Virginia

The official seal of the U.S. state of West Virginia in 1889.

The official seal of the U.S. state of Wisconsin in 1889.

Wisconsin

The official seal of the U.S. state of Wisconsin in 1889.

The official home of the President of the United States of America.

White House and Trees

The official home of the President of the United States of America.

"A genus of insects, the type of a very numerous family, which forms the order Parasita or Auoplura. The body is flattened, almost transparent; the segments both of the thorax and abdomen very distinct; the mouth is small and tubular, enclosing a sucker; there are no wings; the legs are short, and are terminated by a claw adapted for taking hold of hairs or feathers. The eyes are simple, one or two on each side of the head. All the species are small, and live parasitically, on human beings, terrestrial mammalia, and birds." — Chambers, 1881

Magnified Louse

"A genus of insects, the type of a very numerous family, which forms the order Parasita or Auoplura.…

"The Chinese lower orders live much in tents. They are ordinarily of matting. These people are clever in their construction, and make them of great size, and with considerable comfort." — Chambers, 1881

Chinese Tent

"The Chinese lower orders live much in tents. They are ordinarily of matting. These people are clever…

An asymetrical fish that live sup to 200m below the surface.

Common Plaice

An asymetrical fish that live sup to 200m below the surface.

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

A rodent that live sunderground on prairies. They are about a foot long, very stout, squat, paunchy form with low ears and ver short tail.

Prairie Dogs

A rodent that live sunderground on prairies. They are about a foot long, very stout, squat, paunchy…

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Great Diving Beetle

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Great Diving Beetle

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

"Now it is the inclination of the Earth's axis, as above described, which causes the lengths of the days and nights to differ at the same place at different seasons of the year, for on reviewing the positions of the globe at A, it will be observed that the line formed by the enlightened and dark hemispheres, does not coincide with the line of the axis and the pole, but that the line formed by the darkness and the light, extends obliquely across the line of the Earth's axis, so that the north pole is in the light while the south is in the dark. In the position A, therefore, an observer at the north pole would see the sun constantly, while another at the south pole would not see it at all. Hence those living in the north temperate zone, at the season of the year when the earth is at A, or in the Summer, would have long days and short nights, in proportion as they approached the polar circle; while those who live in the south temperate zone, at the same time, and when it would be Winter there, would have long nights and short days in the same proportion." —Comstock, 1850

Earth Axis

"Now it is the inclination of the Earth's axis, as above described, which causes the lengths of the…