Trees

Catclaw Acacia more images
White Thorn Acacia more images
Desert Ironwood
Velvet Mesquite more images
Foothills Palo Verde more images
Blue Palo Verde more images

Shrubs

Fairy Duster more images
Desert Mistletoe more images
Jojoba
Brittlebush more images
Limberbush
Ocotillo more images
Triangle-leaf Bursage more images
Ratany more images
Creosote Bush more images
Desert Broom more images
Burroweed more images
Canyon Ragweed
Sotol [Desert Spoon]

Cacti

Saguaro more images
Southwest (or Fishhook) Barrel Cactus more images
Hedgehog Cacti more images
Prickly Pear Cacti more images
Fishhook Pincushion Cactus
Jumping (or Chain-fruit) Cholla more images
Teddybear Cholla
Staghorn Cholla more images
Christmas Cholla more images

Bark Scorpion
Giant Desert Hairy Scorpion (also can call Giant Hairy Scorpion)
Tarantulas
Black Widow
Brown Spider (also can call Brown Recluse)
Desert Millipede
Giant Desert Centipede
Pinacate Beetle (also can call Desert Stink Beetle)
White-lined Sphinx Moth
Tarantula Hawk
Red Velvet Ant
Carpenter Bees
Leaf-Cutting Ants
Pallid-winged Grasshopper
Creosote Bush Grasshopper
Termites
Cochineal Bug
Convergent Ladybird Beetle

Desert Pupfish
Gila Topminnow

Tiger Salamander
Sonoran Desert Toad
Red-spotted Toad
Canyon Treefrog
Desert (or Couch's) Spadefoot
Southern Spadefoot

Desert Tortoise
Western Banded Gecko
Zebratail Lizard
Collared Lizard
Short-horned Lizard
Regal Horned Lizard
Side-blotched Lizard
Tree Lizard
Spiny Lizards
Sonoran Spotted Whiptail
Western Whiptail
Gila Monster
Gopher Snake
Common King Snake
Blackneck Garter Snake
Arizona Coral Snake
Western Diamondback Rattlesnake
Sidewinder

Sanborn's (or Lesser) Long-nosed Bat
Western Pipistrelle
Desert Cottontail
Black-tailed Jackrabbit
Harris' Antelope Squirrel
Rock Squirrel
Round-tailed Ground Squirrel
Kangaroo Rats
Grasshopper Mice
White-throated Woodrat (or Packrat)
Coyote
Kit Fox
Gray Fox
Ringtail
Raccoon
Coati
Striped Skunk
Bobcat
Mountain Lion
Javelina (or Collared Peccary)
Mule Deer
White-tailed Deer
Pronghorn
Bighorn Sheep