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The stages of a butterfly: the caterpillar, the pupa, and the adult butterfly.

Butterfly

The stages of a butterfly: the caterpillar, the pupa, and the adult butterfly.

Metamorphosis of the monarch butterfly, egg

Monarch Butterfly

Metamorphosis of the monarch butterfly, egg

Metamorphosis of the monarch butterfly, larva

Monarch Butterfly

Metamorphosis of the monarch butterfly, larva

Metamorphosis of the monarch butterfly, pupa

Monarch Butterfly

Metamorphosis of the monarch butterfly, pupa

Metamorphosis of the monarch butterfly, adult

Monarch Butterfly

Metamorphosis of the monarch butterfly, adult

Metamorphosis of the crab; the zoea stage.

Crab

Metamorphosis of the crab; the zoea stage.

Metamorphosis of the crab; the megalops stage.

Crab

Metamorphosis of the crab; the megalops stage.

Metamorphosis of the crab; the adult stage.

Crab

Metamorphosis of the crab; the adult stage.

Flounder (also; fluke) are flatfish that live in ocean waters ie., Northern Atlantic and waters along the east coast of the United States and Canada, and the Pacific Ocean, as well. While flounders have both eyes situated on one side of the head, they are not born this way. Their life involves metamorphosis. During metamorphosis, one eye migrates to the other side of the body so that both eyes are situated on the upward-facing side of its body. After metamorphosis, flounder lie on one side on the ocean floor; either the left or right side might face upward depending on the species.

Flounder

Flounder (also; fluke) are flatfish that live in ocean waters ie., Northern Atlantic and waters along…

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Frog Egg

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Frog Eggs

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

"Life history of a frog. Tadpoles during emergence of limbs." -Thomson, 1916

Frog Stage 3

"Life history of a frog. Tadpoles during emergence of limbs." -Thomson, 1916

"Life history of a frog. Tadpoles with both pairs of limbs apparent." -Thomson, 1916

Frog Stage 4

"Life history of a frog. Tadpoles with both pairs of limbs apparent." -Thomson, 1916

A gadfly, or Bot-fly, that lays its eggs on horses. After these eggs hatch on the skin, the larvae bore into the skin and create tumors ('warbles') beneath it. When fully fed, they leave their host and drop to the ground, bury themselves, and, after pupation, emerge as flies. This illustration is enlarged, and also shows the larvae.

Gadfly of Horse

A gadfly, or Bot-fly, that lays its eggs on horses. After these eggs hatch on the skin, the larvae bore…

This illustration shows the Gadfly of the Ox. This illustration is enlarged, and also shows a Gadfly larvae.

Gadfly of Ox

This illustration shows the Gadfly of the Ox. This illustration is enlarged, and also shows a Gadfly…

Gall-fly is a name applied to the members of the family Cynipidae, which are not flies, but are related to ants and bees (order Hymenoptera).

Gall-fly

Gall-fly is a name applied to the members of the family Cynipidae, which are not flies, but are related…

Gooseberry Caterpillar is the name applied to the larvæ of two different insects, both injurious to gooseberry and currant bushes. (1) the Magpie Moth (Abraxas grossulariata), appearing about midsummer, has usually a black head, yellow body, and white wings spotted with black. (2) More destructive than the above is the larva of the Gooseberry Sawfly (Nematus ribesii), which plays havoc with the leaves of bushes. The larva is bluish green, with lack head, feet, tail, and spots, with twenty feet, and a length of about 3/4 of an inch when full grown.

Gooseberry Caterpillar (Nematus ribesii) and Sawfly

Gooseberry Caterpillar is the name applied to the larvæ of two different insects, both injurious to…

Metamorphosis of the mosquito, larva

Mosquito

Metamorphosis of the mosquito, larva

Metamorphosis of the mosquito, pupa

Mosquito

Metamorphosis of the mosquito, pupa

Metamorphosis of a moth.

Moth

Metamorphosis of a moth.

The garden tiger moth (Arctia caja) is named for the different and colorful patterns on its wings.

Tiger Moth

The garden tiger moth (Arctia caja) is named for the different and colorful patterns on its wings.

Illustration of a pupa attached to a wall. A pupa (Latin pupa for doll, pl: pupae or pupas) is the life stage of some insects undergoing transformation. The pupal stage is found only in holometabolous insects, those that undergo a complete metamorphosis, going through four life stages; embryo, larva, pupa and imago.

Pupa

Illustration of a pupa attached to a wall. A pupa (Latin pupa for doll, pl: pupae or pupas) is the life…

Illustration of a pupa attached to a leaf. A pupa (Latin pupa for doll, pl: pupae or pupas) is the life stage of some insects undergoing transformation. The pupal stage is found only in holometabolous insects, those that undergo a complete metamorphosis, going through four life stages; embryo, larva, pupa and imago.

Pupa

Illustration of a pupa attached to a leaf. A pupa (Latin pupa for doll, pl: pupae or pupas) is the life…

Second zoaea stage of a shrimp's development.

Developing shrimp

Second zoaea stage of a shrimp's development.

Mysis stage of a shrimp's development.

Developing shrimp

Mysis stage of a shrimp's development.

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Tadpole

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Tadpole

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

The termite, here showing the winged phase of its life and a termite mound.

Termite

The termite, here showing the winged phase of its life and a termite mound.