Bentsen-Rio Grande State Park May 1, 2014 by Dogger Our First big day was in McAllen Texas at Bentsen Rio grande St. Park. Its right on the Rio Grande River and had some of our best birds! Site Marker for the Park Plain Chachalaca Wild Olive Trees were in Bloom Broad Wing Hawks ride some Thermals early in the Morning Grooved=Billed Ani a Life list bird for me Bronzed Cowbird