Geranomyia crane flies are most well recognized for their elongate mouthparts used in nectar feeding.

Geranomyia are typically small to medium in size (4-10 mm) with bodies brown or green in life.

Life cycle and behavior: Adult Geranomyia usually emerge in early spring and typically have a rather long period of active feeding, from April until October.

When feeding or at rest, they engage in a bouncing or bobbing movement, which is specific to only Geranomyia, and the function of the behavior is unknown.

Larvae tend to be similar to many other limoniids, as they are semi-aquatic and form silken, gelatinous tubes with algal filaments which they feed upon.

One species, Geranomyia recondita (Alexander 1921), develops a globular mass made of a clear jelly-like substance on leaves.

Adults are typically found in close proximity to their larval habitats, near riffles in streams but also on limestone cliffs and overhanging springs.

Borkent, Art & Brown, Brian & Adler, Peter & Amorim, Dalton & Barber, Kevin & Bickel, Daniel & Boucher, Stephanie & Brooks, Scott & Burger, John & Burington, Z.L.

& Capellari, Renato & Costa, Daniel & Cumming, Jeffrey & Curler, Greg & Dick, Carl & Epler, John & Fisher, Eric & Gaimari, Stephen & Gelhaus, Jon & Zumbado Arrieta, Manuel.

Remarkable fly (Diptera) diversity in a patch of Costa Rican cloud forest: Why inventory is a vital science.

In: R. W. Merritt, K. W. Cummins and M. B. Berg (editors), An introduction to the aquatic insects of North America, fifth edition, xviii + 1480 pp.

"Observations on the Bizarre Jelly Mass Habit of Larval Geranomyia (Diptera: Tipulidae: Limoniidae)."

Qian X, Zhang X (2020) Two new Geranomyia Haliday (Diptera, Limoniidae) crane flies from Mount Jiulong in China, with an updated key to Chinese species.

Further Reading: "Catalogue of the Craneflies of the World (Diptera, Tipuloidea: Pediciidae, Limoniidae, Cylindrotomidae, Tipulidae)".