Some bird species that drop by for a visit during certain months of the year include the acorn woodpeckers, ash-throated flycatchers, black-chinned and broad-tailed hummingbirds, cactus and canyon wrens, greater roadrunners, lesser nighthawks, loggerhead shrikes, northern flickers, scaled quail, Scott's orioles, spotted sandpipers, tufted titmice, bushtits, western wood-pewees, white-throated swifts, white-winged doves and Wilson's warblers.
The mammals you could see at the Big Bend National Park include the desert cottontails, black-tailed jackrabbits, rock squirrels, Texas antelope squirrels, Merriam's kangaroo rats, coyotes, gray foxes, raccoons, striped skunks, mule deer, and white-tailed deer.
You should be careful when you go bird watching at the National Park. There are also a few poisonous snakes like the diamondback, the Mojave, the black tailed rattlesnake and the trans-pecos copperhead. There have also been reported sightings of Mountain Lions and Black Bears. Since the Park was opened to the public, there have only been 4 attacks on humans.
The Big Bend National Park is open all year round. More than 300,000 visitors come here annually so pack along your gear and head out for some bird watching at the Big Bend. You can camp here for a few days and even get some snapshots which you can add to your collection back home.
So you don’t get lost, you can get a Ranger to guide you around, join a nature seminar and a host of other activities that are offered at the park.