Margined Calligrapher fly
(Linum perennial)
Quick ID
A very small, slender hoverfly (¼ inch or less) with black and yellow stripes that mimic a tiny wasp or bee. Look closely: its body is glossy, its wings are clear, and it has only one pair of wings (flies do), not two pairs like bees/wasps.
Ecological Role
Adults are pollinators, sipping nectar and pollen from flowers.
Their larvae are natural pest controllers, feeding on soft-bodied insects like aphids—helping gardens and farms by reducing pests without chemicals.
At-a-Glance
Size: Tiny—¼ inch or less
Colors: Black with thin yellow stripes
Wings: One pair, clear
Flight Season: Spring through fall
Diet (Adults): Nectar and pollen
Diet (Larvae): Aphids and other small soft-bodied insects
Social? No—solitary
Where to Find It
Range: Widespread across North America.
Habitat: Gardens, meadows, roadsides, farms—wherever flowers bloom.
Activity: Most active in warm, sunny weather.
Look-Alikes
Small bees/wasps: The yellow-and-black mimicry is a disguise! Unlike bees/wasps, hoverflies never sting.
Other Hoverflies: Many look similar; Toxomerus marginatus is one of the most common species in North America.
Why It Matters
Though easy to overlook, these little flies are double helpers: pollinating plants and controlling garden pests. They’re a reminder that not every “bug” is a problem—many are tiny allies working behind the scenes.
Safety
Completely harmless—no stingers, no biting mouthparts. Safe to watch up close.
Fun Fact
They can hover in mid-air like a helicopter, zipping side-to-side with precision flying skills that put drones to shame.
Dig Deeper
Curious for more? Read the blog.
Recommended Book References
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