Flies Flies are a remarkably diverse set of insects and they play important biological roles. They are important pollinators and decomposers. Calligrapher Fly, Eastern Calligraphers are tiny hoverflies that frequent flowers in our garden. Calligrapher Fly, Margined This hoverfly is quite beautiful up close. Crane Fly Crane flies are large delicate flies that look like huge mosquitoes. Peacock Fly These small picture-winged flies are fascinating–holding their wings above their backs. Tachnid Fly, Black Tachnid flies are important pollinators, and they seem to prefer white flowers in our garden. Tachnid Fly, Red The red and black tachnid flies are actually different species. Common Flower Fly This is a hoverfly that feeds on nectar in flowers.