This robber fly is known as Triorla interrupta and was photographed in Austin, Travis Co., Texas in October 2004 with a Canon EOS 1D Mark II and an EF 300 mm F/4L IS lens with a 2X extender and 550 EX flash. Herschel Raney has more excellent photos of this species on his Arkansas site here and Giff Beaton has shots from Georgia here. At Giff's site scroll down to several shots of this species. This is a very widespread species in the U.S. as well as Mexico and central America. My thanks to Herschel Raney and Mike Thomas for their help with identification of this robber. I will add more shots of this species when I can.

Below are two more shots of this species taken with the same equipment as above, also in Austin, Travis Co., Texas in the spring and early summer, 2005.