SHEET, JOHN 1989 Journal Rio Grande Tributary Creek Survey from 35 miles NW R. Zarela West Cr. to San Ygnacio Zapata Cr., Texas August 19 Light, variable winds early, becoming 5.-10-15mph by early after- noon. Temperature range 75°-100°F. Species list: Anas fuscus sp (f) - 3 Raptiles: turtle sp - 1 Crawfish - 1, about 3½' spx-shelled turtle sp - 1 Ducks: Red-Winged Drake - 2, lg pond FM 1472 Vertipie Crane - 1, lg pond FM 1472 Green Heron - 1, 1472; 1, S.Y. Green Egret - 1, 1472; 3, S.Y. Sunny Egret - 3, S.Y.; 1, 1472 Dun-Rackled Tern - 2, S.Y.; 1, 1472 Black-Crowned Night Heron - 2, S.Y. Black-Billed Whistling Duck - 2, 1472 Turkey Vulture - many, widespread Harris' Hawk - 4, along Hwy 83 Swainson's Hawk - 1, lg pond FM 1472 Red-Tailed Hawk - 3, along Hwy 83 Crested Caracara - 5, along Hwy 83 Cormorant - 6, FM 1472 Kieler - 2, S.Y.; 1, 1472 Spotted Sandpiper - 1, S.Y. Upland Sandpiper - 3, F.O. Arroyo Drenas Rock Dove - 12, San Ygnacio White-winged Dove - 6, S.Y. Mourning Dove - abundant Common Ground Dove - 6, S.Y. Greeter Crabrunner - 1, near S.Y. Snorkel-Gilded Oriole - 5, S.Y. Green Heron Owl - H.O., near road Green Kingfisher - 1, S.Y. Dobbs Frosted Woodpecker - 3, S.Y. Ladder-backed woodpecker - 1, S.Y. Red-throated Loon - 1, S.Y. Great Kiskadee - H.O., S.Y. Croaker Kingfisher - 1, S.Y. W. Kingbird - 6, FM 1472 Screen-tailed Flycatcher - 10, spread wide Barn Swallow - near water v. common scattered others Chihuahua Raven - 4, S.Y. total 15 Verdin - 1, 1472; 2, near S.Y. Calliope Wren - H.O., S.Y. Baya Gray Quailteeth - 2, S.Y. N. Mockingbird - several, widespread Curve-billed Thrasher - 1, S.Y. Fogger Bark Shrike - 1, FM 1472 N. Cardinal - 2, S.Y.; 2 Arroyo Drenas Pyrrhuloxia - 3, small pond 1472