National Geographic : 1939 Jan
Hdalo .. . . . ... .... . r y , d zo3p " - , .ME I I OKLA. "t ..... ... SOF THE LOWER RIO GRANDE am, - GraBru.O P s TEXAS A Citrus Fruit Q9 Oil Br nsvIe :,6 30 *Austin Beef Cattle Dairying 0 Mat ' WBRO NSVLLE AIRPORT " Cotton E Railroads -- Matamoro, ( 11 MEXICO _Lar Vegetables Highways > J -.'I LES STATUTE MILLS 04 100 96 98 LONGITUDE WEST OF GREENWICH 97 30 Drawn byNewman Bumstead and Ralph E.McAleer THE RIO GRANDE DELTA, AN AREA AS LARGE AS DELAWARE, IS A FERTILE FRAGMENT OF VAST TEXAS A sparsely inhabited jungle only 40 years ago, the Rio Grande Delta of Texas is now flecked with towns and crisscrossed byhighways and railways. Irrigation canals, filled by pumps from the once-destructive river, water this semitropical region producing citrus fruits and winter vegetables. Off the shores ofthe Delta and initsstreams and lakes many fish are caught. Winter warmth makes the region a haven for birds. Green Island is a bird sanctuary which has helped save the reddish egret from extinction. Nesting on the island are also other thousands of snowy and American egrets, Louisiana and Ward's herons, and black-crowned night herons.