Bill Walker: crw_7771
Bill Walker: crw_7689
Bill Walker: crw_7340
Bill Walker: crw_7338
Bill Walker: crw_7322
Bill Walker: "Sludge Drying Ponds"
Bill Walker: crw_7290
Bill Walker: crw_7287
Bill Walker: crw_7268
Bill Walker: crw_7255
Bill Walker: crw_7202
Bill Walker: crw_7195
Bill Walker: Black skimmers
Bill Walker: Laughing Gull
Bill Walker: Sandwich Tern
Bill Walker: crw_7172
Bill Walker: Whooping Crane Tours
Bill Walker: crw_7101
Bill Walker: crw_7075
Bill Walker: Rabbit's Cluster
Bill Walker: Rio Grande River
Bill Walker: Frio Bat Cave
Bill Walker: Frio Bat Cave
Bill Walker: Bats at sunset
Bill Walker: Frio Bat Cave
Bill Walker: Frio Bat Cave
Bill Walker: Sunset
Bill Walker: Leakey, TX
Bill Walker: crw_7877
Bill Walker: crw_7871