Quick Facts
- Also called:
- small-headed fly
- Related Topics:
- Brachycera
Adding us as a Preferred Source tells Google you trust our content, so our articles show up more often in your Google Search, Discover feed, and AI Overviews.
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies.
Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
balloon fly
Balloon fly, illustration by John Curtis, 19th century.
balloon fly
insect
Also known as: Acroceridae, small-headed fly
balloon fly, (family Acroceridae), any member of a family of flies in the insect order Diptera that are named for their swollen abdomen. It is also characterized by an extremely small head and a humped back. Some adults have a slender proboscis (feeding organ) and feed from flowers, whereas others lack a proboscis and probably do not feed in their adult stage. Eggs are laid on leaves and flowers. Upon hatching, the larvae are small and flat. They eventually come in contact with a spider that they board. They then burrow into the spider’s body, where they feed as internal parasites.
This article was most recently revised and updated by Amy Tikkanen.

" height="20" alt="HEW Logo">