Condylostylus sipho
(Say, 1823)
long-legged fly
Pronunciation
How to pronounce Condylostylus sipho: /kɒnˈdɪloʊstɪləs ˈsaɪfoʊ/
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Identification
Identification to level in Condylostylus generally requires examination of male . The Condylostylus can be distinguished from other genera by a combination of and leg characters, though specific distinguishing features for C. sipho versus are not well documented in accessible literature. The species is part of a within the genus.
Images
Appearance
As a member of the Condylostylus, this exhibits the typical body plan: small size (likely under 5 mm), slender build, and notably elongated legs. Condylostylus species are typically metallic green, , or bronze in coloration. Males possess forward-protruding at the tip of the , visible as curled appendages beneath the abdomen. The are large and prominent, with complex patterns.
Habitat
Found in gardens, along forest edges, and similar sunny, open . Typical of Condylostylus , it frequents vegetation in sunlit areas where it hunts small .
Distribution
North America. The was described by Thomas Say in 1823, indicating an established presence in the eastern or central United States.
Diet
Predatory on other small . As with other dolichopodids, it likely captures using modified mouthparts—specifically an extendable lower lip with opposable lobes used to crush or tear victims.
Life Cycle
Larval biology unknown. Most are aquatic or semi-aquatic , but specific details for C. sipho have not been documented.
Behavior
Active, fast-moving that rarely pauses. Highly sensitive to disturbance and camera pre-flash, making observation and photography challenging. Males likely perform , as is typical for the , though specific behaviors for this are unrecorded.
Ecological Role
of small in terrestrial and edge . Contributes to regulation of of minute in sunny vegetation zones.
Human Relevance
Potential value as a agent in gardens due to predatory habits. No documented negative impacts.
Similar Taxa
- Other Condylostylus speciesConspicuously similar appearance; -level identification requires examination
- Dolichopus speciesShare metallic coloration and long-legged build, but Dolichopus males have distinctive ornamented with -like flags not present in Condylostylus
- Hydrophorus speciesSimilar metallic appearance, but Hydrophorus are associated with water surfaces and exhibit skating unlike typical Condylostylus
More Details
Taxonomic note
Condylostylus sipho is listed as a 'complex' in some databases, suggesting potential cryptic diversity or unresolved boundaries within this nominal .


