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Zoology

zO ol' o jE, the scientific study of animals

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About Caddis Flies
About Caddis Flies
The most interesting feature of the caddis flies is the life of the larvae, which varies in the different families and genera. They can be divided into two main types -- those which build portable cases and are almost all vegetarians, and those which live free and are at least partly carnivorous.

CONTENTS

Biography
Biography

Zoos, Animal Parks, Etc.
Zoos, Animal Parks, Etc.

Animal Behavior and Psychology
Animal Behavior and Psychology

Embryology

Protozoa
Kingdom Protozoa
a group of single-celled organisms that have characteristics of both plants and animals

Phylum Cnidaria
Phylum Cnidaria
a group of invertebrate radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures that includes corals and jellyfish

Phylum Porifera
Phylum Porifera
a group of primarily marine invertebrates characterized by having a body covered with pores; sponges

Phylum Annelida
Phylum Annelida
a group of invertebrates characterized by having a segmented body

Phylum Echinodermata
Phylum Echinodermata
a group of radially symmetrical marine invertebrates that includes starfish and sea urchins

Mollusks
Mollusks
any member of the phylum of invertebrates with a soft body usually protected by a shell

Class Pycnogonida
Class Pycnogonida
a class of arthropods comprising about 1,500 species of sea spiders

Arachnids
Arachnids
a class of animals characterized by having four pairs of segmented legs

Crustaceans
Crustaceans
an arthropod characterized by having the body at least partially covered with a hard shell, including crabs, lobsters, shrimps, etc.

Insects
Insects
any of a class of arthropods having the body divided into three parts and having three pairs of legs

Fishes
Fishes
any of various cold-blooded aquatic vertebrates having gills, fins, and typically scales

Reptiles and Amphibians
Reptiles and Amphibians
frogs, salamanders, crocodiles, lizards, snakes, etc.

Birds
Birds
warm-blooded vertebrates that lay eggs and have feathers and wings

Mammals
Mammals
warm-blooded vertebrates that nourish their young with milk from maternal mammary glands

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