Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Family Anisopodidae - Wood Gnats

Wood Gnat - Sylvicola fenestralis Shelton Dipt 1 - Sylvicola fenestralis Fly? - Sylvicola Sylvicola cf. notialis - Sylvicola - female wood gnat - Sylvicola alternatus - male Sylvicola (subgenus Anisopus) sp - Sylvicola Sylvicola alternatus Sylvicola fenestralis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Nematocera" (Non-Brachycera))
Infraorder Bibionomorpha (Gnats, Gall Midges, and March Flies)
Family Anisopodidae (Wood Gnats)
Other Common Names
window gnats (in part)
Explanation of Names
Anisopodidae Knab 1912
from Anisopus, 'having dissimilar feet'
9 spp. in 3 genera in our area(1), ~200 spp. in 24 genera total(2)
4-8 mm
mosquito-like but proboscis shorter than head; usually dark spots on wings
worldwide distribution
larvae found in or near decaying wood or vegetation, fermenting sap, animal manure, tree trunks, mud, and sometimes sewage
adults found on foliage or around flowing sap in or near damp places; sometimes seen in swarms and may be attracted to light