Big Bend National Park (Chihuahuan Desert, West Texas) hosts extraordinary biodiversity across desert, mountain, and riparian habitats:
Black bear, mountain lion, bobcat, coyote, gray fox, mule deer, white‑tailed deer, pronghorn, javelina, ringtail, rock squirrel, kangaroo rat, bats.
Golden eagle, peregrine falcon, zone‑tailed hawk, Colima warbler, Lucifer hummingbird, vermilion flycatcher, roadrunner, scaled quail, Montezuma quail.
Western diamondback rattlesnake, black‑tailed rattlesnake, Gila monster, Texas horned lizard, crevice spiny lizard, canyon treefrog, Rio Grande leopard frog, spadefoot toads.
Rio Grande silvery minnow, blue sucker, channel catfish, largemouth bass, green sunfish (in Rio Grande and springs).
Tarantulas, vinegaroons, centipedes, harvester ants, monarch butterflies, 60+ bee species.
The park's location on the Central Flyway and its elevational gradient (1,800‑7,800 ft) create a unique mixing zone for eastern/western and tropical/temperate species.