Location: Rio Rancho, New Mexico
July 9, 2011 3:16 am
I noticed this bug hanging on the curtains on my back porch about 7pm July 5th. I saw photos of dobson flies on your site and am wondering if this is one. It’s the 1st insect like it I’ve ever seen here in New Mexico, or anywhere else!
You are correct. This is a female Dobsonfly, but we don’t believe it is the most commonly reported species, Corydalus cornutus, the Eastern Dobsonfly, which BugGuide only reports as far west as Texas despite the hundreds of submissions they have received. We researched your city, Rio Rancho, and we learned it is in northwest New Mexico, far from Texas. The genus page on BugGuide has this information regarding the range of Dobsonflies: “The only eastern species is Eastern Dobsonfly, Corydalus cornutus. Three other species apparently have very limited distribution in North America: Corydalus luteus – South Texas, Corydalus texanus – SW US west of the Rocky Mountains, Corydalus bidenticulatus – Arizona. Genus is restricted to the New World–other species in Central and South America (Contreras-Ramos, 1997).” We will go out on a limb and identify this as one of the western species, however, we don’t have a conclusive species identification.