I believe this is a Lauxaniid Fly, possibly a Minettia obscura, with unidentified yellow matter stuck to its back. This fly's eyes seem to take most of its head space. This is a 2.8:1 nighttime macro. This fly was drawn to the outside (flood) lighting on the deck in rural upstate Columbia County, New York, USA. For this image, I used my manual focus Tamron Adaptall-2 Model 52BB SP 90mm f2.5 Macro Lens and Tamron Adaptall-2 18f 1:1 Tube and Tamron Adaptall-2 140f 1.4X Flat Field Teleconverter and Tamron Adaptall-2 01f 2X Flat Field Teleconverter with attached Tamron Adaptall-2 Pentax K A Mount, all mounted to Pentax K20D Camera, Manually Focused, Hand Held, Manual Mode, Shake Reduction 300mm, ISO 400, f5.6 on lens, 1/45 sec., with fill-in flash from camera's built-in electronic flash. This is a Full Resolution Large JPEG and is Straight Out Of Camera (SOOC) and is without any post processing, editing, adjustment, cropping, or re-sizing. There is good head detail visible in the Original Size.