Mammals warm-blooded higher vertebrates (such as placentals, marsupials, or monotremes) that nourish their young with milk using mammary glands. Some endangered mammals: Jaguar, Cheetah, Cougar, Brown Bear, Steller Sea-lion All endangered mammals. |
Birds warm-blooded feathered vertebrates (such as penguins, eagles, pigeons). Some endangered birds: Harpy Eagle, Ostrich, Egyptian Vulture, California Condor, Red-cockaded Woodpecker All endangered birds. |
Reptiles air-breathing vertebrates that include the alligators and crocodiles, lizards, snakes, and turtles. Some endangered reptiles: Indian Python, Galapagos Tortoise, Siamese Crocodile, Hawksbill Sea Turtle, Tracaja All endangered reptiles. |
Plants organisms such as trees, herbs, or shrubs. All endangered plants. |
Fishes cold-blooded strictly aquatic craniate vertebrates (such as trout, pupfish, and salmon). Some endangered fishes: Rainbow Parrotfish, Ornate Eagle Ray, Smalltooth Sawfish, White Sturgeon, Pallid Sturgeon All endangered fishes. |
Insects small invertebrate arthropods (such as ants or butterflies). Some endangered insects: Boisduval's Blue Butterfly All endangered insects. |
Amphibians cold-blooded vertebrates (such as frogs, toads, or salamanders). Some endangered amphibians: Chinese Giant Salamander, Monte Verde Golden Toad All endangered amphibians. |
Snails slow-moving gastropod mollusks usually enclosed in spiral shells. Some endangered snails: Socorro Springsnail, Black Mudalia, Armigerous River Snail, Bruneau Hot Springsnail, Royal Marstonia Snail All endangered snails. |
Clams marine bivalve mollusks living in sand or mud (mussels). Some endangered clams: Shinyrayed Pocketbook All endangered clams. |
Arachnids arthropods that are chiefly terrestrial invertebrates, including the spiders, scorpions, mites, and ticks. Some endangered arachnids: Lake Placid Funnel Wolf Spider, Melones Cave Harvestman, Rameshwaram Ornamental, Robber Baron Cave Meshweaver, Madla's Cave Meshweaver All endangered arachnids. |
Crustaceans aquatic mandibulate arthropods such as crabs and shrimps. Some endangered crustaceans: Aquadulcaris pheronyx, Big Blue Spring Cave Crayfish, Peck's Cave Amphipod, San Diego Fairy Shrimp, Apalachicola Cave Crayfish All endangered crustaceans. |
Worms long, segmented invertebrates such as earthworms and leeches Some endangered worms: Phallodrilus macmasterae, Mesonerilla prospera, Knysna Velvet Worm, White Cave Velvet Worm, Oregon Giant Earthworm All endangered worms. |
Corals, Jellyfish, and Sea Anemones aquatic organisms such as corals, jellyfish, and sea anemones Some endangered corals, jellyfish, and sea anemones: Seriatopora aculeata, Branching Frogspawn Coral, Crisp Pillow Coral, Large Ivory Coral, Seriatopora stellata All endangered corals, jellyfish, and sea anemones. |
Centipedes elongated metameric arthropods possessing one pair of legs per body segment. Some endangered centipedes: Serpent Island Centipede All endangered centipedes. |