Numbers
143 species in North America (
nearctica.com)
more than 2,000 species in 41 subgenera worldwide
Identification
antennae with 12 flagellomeres; radial sectorial vein with two branches
The adults of this species are characterized by elongate mouthparts used for taking nectar from flowers. They display an up-and-down bobbing motion on the surface of rocks or leaves. This bobbing is especially noticeable immediately after the fly has landed or when it has been disturbed.
Food
The larvae feed mainly on algae.
Life Cycle
The larvae spend their lives in gelatinous tubes constructed on rocks covered with algal growth, where the surface is constantly wet along streams or vertical cliffs.
Internet References
The Crane Flies of Pennsylvania (Dr. Chen Young, Carnegie Museum of Natural History)
Contributed by
Robin McLeod on 20 July, 2005 - 8:17pm
Additional contributions by
Beatriz MoissetLast updated 10 December, 2005 - 7:22pm