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© John Pickering, 2004-2017

The mandibles of adult males of the Eastern Dobsonfly, Corydalus cornutus, are impressive and much larger than those of females. They are used in courtship. However, when it comes to biting, watch out for the females! Unlike the showy males, the females' jaws can inflict a painful bite, easily break your skin, and make you bleed. Both male and female adults fly to porch lights. They have a wingspan of about 11cm (4.5 inches). Their larvae are aquatic predators, know as hellgrammites, and because they do better in unpolluted streams, can serve as bio-indicators of water quality.


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title Corydalus cornutus, Eastern Dobsonfly, male and female
country United States
state/province Georgia
county Clarke
city/place/location Athens
street/site/trail 275 Blue Heron Drive
latitude 33.8882
longitude -83.2973
MAPdecimal latitude_longitude ••• 33.8882_-83.2973
determined by who-email-yyyymmdd John Pickering pick@discoverlife.org 2015-06-18
date1 yyyymmdd 2015:06:17 04:52:46

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