Keywords: tabanidae deer fly deerfly horse fly horsefly ocelli insect eyes diptera electronics photo border Public domain image by Karen Perez produced as part of the Insects Unlocked project at The University of Texas at Austin Public domain image by Karen Perez produced as part of the Insects Unlocked project at The University of Texas at Austin Public domain image by Karen Perez produced as part of the Insects Unlocked project at The University of Texas at Austin insect eyes horsefly diptera tabanidae deerfly ocelli |