Cyrtopogon sansoni

Cyrtopogon species are distinguished from other Asilidae by a combination of characters including a relatively slender body form, long legs, and typically pale or banded abdominal coloration. Species-level identification within Cyrtopogon requires examination of male terminalia and other fine morphological details. C. sansoni would be distinguished from congeners by subtle differences in genitalic structure and possibly color pattern, though diagnostic features are not readily summarized in accessible sources.

Members of the genus Cyrtopogon are typically associated with arid grasslands, sagebrush steppe, and open woodland habitats in western North America. Specific habitat associations for C. sansoni are not documented.

The species is recorded from Colorado based on bioblitz documentation. The broader distribution within western North America is not established in available sources.

Courtship behavior has been observed and photographed in Cyrtopogon robber flies, suggesting visual display or aerial pursuit components typical of the genus.

As a predatory asilid, C. sansoni likely functions as a mid-level predator in terrestrial food webs, capturing and consuming other insects. The species may contribute to regulation of prey populations in its habitat.

• Cyrtopogon willistoniAnother Cyrtopogon species documented from the same bioblitz event in Colorado; distinguished by subtle morphological differences in genitalia and coloration
• Other Asilidae genera (e.g., Efferia, Promachus)Larger or more robust robber flies with different body proportions, facial morphology, and leg spination

• robber fly
• asilid
• predatory fly
• western North America
• Colorado
• bioblitz record

• BugGuide
• GBIF taxonomy match
• Catalogue of Life
• Bug Eric: The Bigger Picture
• Bug Eric: Blodgett Peak Bioblitz Report