Yellowjacket-mimic
Guides
Helophilus obscurus
obscure marsh fly
Helophilus obscurus is a syrphid fly commonly found across Canada, the northern United States, and the Rocky Mountains. Adults are flower visitors that obtain nectar and pollen. The species is part of the marsh fly genus Helophilus, though the larval biology of this specific species remains undocumented. It is one of several North American Helophilus species that exhibit yellowjacket mimicry.
Milesia virginiensis
yellowjacket hover fly, Virginia flower fly, Virginia Giant Hover Fly, News Bee
A large, striking syrphid fly native to eastern North America. Adults are notable mimics of yellowjackets and hornets, complete with yellow, brown, and black coloration and a loud droning buzz. The species is active primarily in mid-summer to early fall, frequenting forest edges and meadows. Larvae develop in decaying wood. The species carries extensive American folklore, commonly known as the "News Bee" for its habit of hovering near people.
Sphecomyia brevicornis
Short-horned Yellowjacket Fly
Sphecomyia brevicornis is a species of syrphid fly (flower fly) notable for its striking mimicry of yellowjacket wasps. It belongs to a small genus of wasp-mimicking flies that exhibit exceptional morphological convergence with vespid wasps. The species was described by Osten Sacken in 1877. Its specific epithet 'brevicornis' refers to the relatively short antennae compared to related species.
Sphecomyia columbiana
Columbian Yellowjacket Fly
Sphecomyia columbiana is a species of syrphid fly in the family Syrphidae, described by Vockeroth in 1965. The genus Sphecomyia is known for remarkably convincing wasp mimicry, particularly of yellowjackets. The specific epithet 'columbiana' refers to its known distribution in Canada.
Sphecomyia dyari
Dyar's Yellowjacket Fly
Sphecomyia dyari is a species of syrphid fly (family Syrphidae) known for its striking resemblance to yellowjacket wasps. It belongs to a genus notable for exceptionally convincing wasp mimicry, including elongated antennae and flight patterns that imitate queen yellowjackets searching for nest sites. The species was described by Shannon in 1925 and is found in the United States. Like other members of its genus, it likely serves as a Batesian mimic, gaining protection from predators by resembling stinging wasps.
Sphecomyia pattonii
Patton's Yellowjacket Fly
Sphecomyia pattonii is a large wasp-mimicking syrphid fly in the subtribe Criorhinina, originally described by Williston in 1882. It belongs to the S. pattonii species group, distinguished from congeners by the absence of pruinose scutellar vittae. The species exhibits classic yellowjacket mimicry, including coloration, body form, and flight behavior similar to Vespula queens. As with other members of its subtribe, the larval stage likely develops in decaying wood or rot holes, though this remains unconfirmed for this species.
Spilomyia kahli
Yellow-tailed Hornet Fly
Spilomyia kahli is a species of hover fly in the family Syrphidae, commonly known as the Yellow-tailed Hornet Fly. It is one of approximately 13 North American species in the genus Spilomyia, a group renowned for their exceptional mimicry of yellowjacket wasps. The species was described by Snow in 1895. Like other members of its genus, it likely exhibits sophisticated visual and acoustic mimicry to avoid predation.