Atta mexicana queen. She will have mated with a male winged ant (who immediately dies) and then landed and set up her colony after shedding her wings. Note the scars where wings were previously attached, and the difference in size between the queen and worker.
Texas leafcutter ants farm crops of fungus that evolved cold tolerance to Texas winters, just as northern farmers cultivate cold-weather crops, researchers from The University of Texas at Austin have found. #science