Mexican Long-tongued Bat (Choeronycteris mexicana).Mexican Long-nosed Bat (Leptonycteris nivalis).Mexican Ground Squirrel (Spermophilus mexicanus).Ghost-faced Bat (Mormoops megalophylla).Desert Cottontail (Sylvilagus audubonii).California Myotis (Myotis californicus).Brazilian Free-tailed Bat (Tadarida brasiliensis).Bottlenose Dolphin (Tursiops truncatus).

Black-tailed Prairie Dog (Cynomys ludovicianus).

Black-tailed Jackrabbit (Lepus californicus).

Big Free-tailed Bat (Nyctinomops macrotis).

American Parastrelle (Parastrellus hesperus).

This group includes: Monotremes - duckbilled platypus, echidnas, Marsupials - opossums, kangaroos, and Placentals - most other mammals. Most mammals give birth to miniature versions of themselves.

Mammals are warm-blooded air-breathing vertebrates.

Lightning Whelk (Busycon perversum pulleyi).

They may live on land or in water, and may be covered by a shell or exoskeleton.

Invertebrates are ' cold-blooded' animals with no backbone.

Vermilion Snapper (Rhomboplites aurorubens).

Southern Flounder (Paralichthys lethostigma).

Shortnose Gar (Lepisosteus platostomus).

Sheepshead Minnow (Cyprinodon variegatus).

Sheepshead (Archosargus probatocephalus).

Rio Grande Cichlid (Herichthys cyanoguttatus).

Leon Springs Pupfish (Cyprinodon bovinus).

Largemouth Bass (Micropterus salmoides).

Golden Shiner (Notemigonus crysoleucas).

Freshwater Drum (Aplodinotus grunniens).

Florida Pompano (Trachinotus carolinus).Comanche Springs Pupfish (Cyprinodon elegans).Clear Creek Gambusia (Gambusia heterochir).Bigmouth Buffalo (Ictiobus cyprinellus).Atlantic Cutlassfish (Trichiurus lepturus).Atlantic Croaker (Micropogonias undulatus).This group includes: Agnatha - lampreys and hagfish, Chondrichthyes - sharks, skates and rays, and Osteichthyes - all other fish. Most fish lay eggs, though a few species give birth to live young. They fall into three main groups: agnatha or jawless fish, chondrichthyes or cartilaginous fish and osteichthyes or bony fish. Fish are scaled, ' cold-blooded' vertebrates found in water environments.Yellow-billed Cuckoo (Coccyzus americanus).Scissor-tailed Flycatcher (Tyrannus forficatus).Ruby-throated Hummingbird (Archilochus colubris).Red-cockaded Woodpecker (Picoides borealis).Red-bellied Woodpecker (Melanerpes carolinus).Pied-billed Grebe (Podilymbus podiceps).Northern Mockingbird (Mimus polyglottos).Northern Cardinal (Cardinalis cardinalis).Northern Aplomado Falcon (Falco femoralis).Mississippi Kite (Ictinia mississippiensis).Mexican Spotted Owl (Strix occidentalis lucida).Long-billed Curlew (Numenius americanus).Interior Least Tern (Sterna antillarum athalassos).Golden-cheeked Warbler (Dendroica chrysoparia).Eastern Brown Pelican (Pelecanus occidentalis).Buff-bellied Hummingbird (Amazilia yucatanensis).

Black-necked Stilt (Himantopus mexicanus).

Black-crowned Night-heron (Nycticorax nycticorax).

Black-chinned Hummingbird (Archilochus alexandri).

Attwater's Prairie Chicken (Tympanuchus cupido attwateri).

Arctic Peregrine Falcon (Falco peregrinus tundrius).

American Peregrine Falcon (Falco peregrinus anatum).

American Oystercatcher (Haematopus palliatus).

American Avocet (Recurvirostra americana).

All birds lay eggs that are covered with a calcium carbonate shell. Birds have beaks, wings and scale covered legs.

Birds are warm-blooded, air-breathing vertebrates.

Texas Blind Salamander (Eurycea rathbuni).

Southern Leopard Frog (Rana sphenocephala).

Blanco Blind Salamander (Eurycea robusta).

Barton Springs Salamander (Eurycea sosorum).

Barred Tiger Salamander (Ambystoma tigrinum mavortium).

This group includes: frogs and toads, salamanders and newts, and caecilians (limbless amphibians).

Amphibians typically are ' cold-blooded' vertebrates which change from an aquatic, water-breathing, limbless larva (or tadpole) to a terrestrial or partially terrestrial, air-breathing, four-legged adult.

Forest armadillo lizard