Diurnal Firefly (Ellychnia corrusca) photo = Firefly,Diurnal_MAC_©DaveSpier_D028362p Ellychnia are large, diurnal fireflies, but adults lack light-emitting organs.
BugGuide ref.: http://bugguide.net/node/view/42641
Luciola lusitanica (Charpentier, 1825) - Lampyridae
Lamprohiza paulinoi (Lampyridae)
cf. Ellychnia corrusca (Coleoptera: Polyphaga: Elateroidea: Lampyridae: Lampyrinae: Photinini). Shenandoah River State Park, Warren County, VA 29 September 2012
Ellychnia corrusca (Coleoptera: Polyphaga: Elateroidea: Lampyridae: Lampyrinae: Photinini).
Occoquan Regional Park, Fairfax County, VA
2 May 2013
They're really quite pretty creatures. This one is different from the black-winged ones I'm used to seeing in suburban areas (ah -- those would be Photinus sp.). This was on a wooded canal bank near a swampy area.
Oh, my. Look what I just found on BugGuide: "Photuris sp. These are the ones in which the female fakes the flashing pattern of another species (Photinus sp.), thereby drawing in males, which she eats! There are several species of Photuris awaiting formal description, so ID beyond genus is pretty much impossible.
… Eric R. Eaton"
This was actually a by-product of a failed photo mission to capture a free firefly lighting up. Like many animals, they face a tradeoff between advertising themselves to potential mates & advertising themselves to predators. Unfortunately, the behavioral adaptations that make it difficult for predators also make it difficult for photographers. :-) They don't start up in the evening until it's hard to see them except by their flash, they seldom flash except in flight, and by the time you can get a fix on them they've gone dark, then they've moved before their next flash. Then of course there are the photographic challenges of focusing on them, photographing them in the low light, or using camera flash without washing out the firefly flash. I might get 'em yet -- maybe I'll think about technique & try again next summer. And remember the DEET next time.
Anyway, here I've settled for a flash photo of one that's resting.
Amused myself by trying for these while I was staking out a cicada killer who was busy digging her burrow, emerging only for a few seconds many minutes apart. Not the best, but I don't have a fancy instafocus SLR.
This is a firefly larva and matches pics on BugGuide of the Black Firefly (Lucidota atra); I've also found pupae of that species (which glow!) in leaf litter a couple of meters from here and seen adults as well. Found while digging up the remaining rotten roots of the elderly dogwood uprooted during the October snowstorm, but unable to ascertain whether they came from the tree or from leaf litter. 16 mm.
Lucidota atra is a day-flying firefly that glows as a larva -- and as a pupa, obviously! -- but not as an adult. (Don't ask my why! What is is glowing for, if not in order to find a mate?) Found it in decaying leaves while gardening. Looks pretty far along, & in fact I observed adults in the area the following day.
8.7 mm long (measured in this position, not uncurled).
Lampyridae is a family of insects in the beetle order Coleoptera. They are winged beetles, and commonly called fireflies or lightning bugs for their conspicuous crepuscular use of bioluminescence to attract mates or prey. Fireflies produce a "cold light", with no infrared or ultraviolet frequencies. This chemically produced light from the lower abdomen may be yellow, green, or pale red, with wavelengths from 510 to 670 nanometers.