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Cormorants are voracious fish eaters. they have fully-webbed feet.

Cormorant

Cormorants are voracious fish eaters. they have fully-webbed feet.

Diving birds, such as the grebe, have webbed (or lobed) feet and are expert in swimming and diving.

Grebe

Diving birds, such as the grebe, have webbed (or lobed) feet and are expert in swimming and diving.

Herring gulls are web-footed and have long wings and tail, with remarkable power of flight.

Gull

Herring gulls are web-footed and have long wings and tail, with remarkable power of flight.

The loon is a diving bird. Its peculiar cry, sometimes resembling a hysterical laugh, has given rise to the expression, "crazy as a loon."

Loon

The loon is a diving bird. Its peculiar cry, sometimes resembling a hysterical laugh, has given rise…

This south American ostrich can not fly, the wings being small; but it is a swift runner, equaling a horse in speed.

Ostrich

This south American ostrich can not fly, the wings being small; but it is a swift runner, equaling a…

Petrels resemble gulls, except in having the nostrils open as two parallel tubes on the top of the beak.

Petrel

Petrels resemble gulls, except in having the nostrils open as two parallel tubes on the top of the beak.

The mud puppy has two pairs of legs. It also has persistent external gills. It can attain a length of two feet.

Mud Puppy

The mud puppy has two pairs of legs. It also has persistent external gills. It can attain a length of…

Diagram of a longitudinal section through a tunicate or ascidian (sea squirt).

Tunicate

Diagram of a longitudinal section through a tunicate or ascidian (sea squirt).