Blue-gray Gnatcatcher (Polioptila caerulea) This Gnatcatcher was making life miserable for this Canyon Towhee (Melozone fusca). I figured the Gnatcatcher and Towhee both had nests in the vicinity and that the Towhees home range overlapped with the Gnatcatchers territory. Photographed in the Chisos Mountains Basin, Big Bend National Park, Brewster County, Texas, USA. Piyon/juniper/oak belt at ca. 1,646 m (5,400 ft) elevation.