Stock photography, photos: Progressive Bee Fly on Sunflower Stock photos of Progressive Bee Fly feeding on Western Sunflower Blossom Photograph: © Jerome Wilson Click for a larger image and more information Keywords associated with this stock photo: Progressive Bee Fly, Exoprosopa, Western Sunflower, Helianthus occidentalis, bee, fly, insect, feeding, sipping, nectar, pollen, pollinate, pollinator, pollination, wings, yellow, flower, black, green background