Subject: large shiny black fly
Location: Walnut Creek, CA
December 22, 2014 10:42 pm
This fly is larger than a large housefly and is conspicuously hairless compared to a housefly. It is jet black and has interesting colored patches on its wings.
This is a wonderful image of an impressive fly in the family Syrphidae, commonly called a Mexican Cactus Fly, Copestylum mexicanum. According to BugGuide: “Larvae feed on rotting cactus” and adults are frequently seen visiting flowers.
Thank you, Daniel! It somehow makes a big difference to the enjoyment of an image to know who the subject is. Dirk