Big Bend , because of it's geographical location, and the variety of the landscape, offers excellent habitat for birds. 425 species are found within the boundaries of Big Bend National Park, more than any other national park and more than all but a few states. Big Bend marks the western limits of the ranges of some eastern species and the eastern limits for certain western species. Same is true,  North and South. In addition, the Rio Grande is an important feature on migratory fly-ways. The list of infrequent occasionals is quite impressive.

 Bird Checklist      Birding Hot Spots          Big Bend Birders

 A few of the birds that typically don't occur in other parts of the U.S., or are easier to find  in the Big Bend area include the Colima Warbler (below),  Lucifer Hummingbird, Band-tailed Pigeon, Varied Bunting, Flammulated Owl, Elf Owl, Mexican Jay, Black-chinned Sparrow, Green Kingfisher, Pyrrhuloxia, and Crissal Thrasher, to name a few.