In the woodlands along the Prairie Dog Town Fork of the Red River, golden-fronted woodpeckers are easy to find. The endangered black-capped vireo is the highlight of this park northeast of Del Rio. Migrating birds arrive in late March and leave by early September. Among the species birders can expect during the summer migration is the gray vireo. Cave swallows are also common at Stuart Bat Cave.
Redheaded woodpeckers are easy to find year-round.
Among the rafts of wood ducks on the lake, look for anhinga, a large, dark water bird with long, loosely-jointed tail. Mature floodplain woodlands and cypress-lined waterways with thickets provide food and shelter for typical Northeast Texas birds. A silent canoe ride through the maze of canals will reveal wood ducks in abundance, along with a variety of other waterfowl, herons and egrets. Flycatchers, vireos, tanagers, buntings and orioles live in the oak woodlands. A number of tropical species found nowhere else in the United States reach the northern limits of their range in the Rio Grande Valley.