"Wow, look at this spider! I've never seen one like this before! Can you watch him while I go get my camera?! Don't let him get away!"
My husband must think I'm crazy. He babysits insects while I'm running for my camera. I spotted this spider on the underside of a fern leaf on our front steps in south Louisiana. When I returned from our house with my camera (I went for the Canon crop sensor and the 100mm f1.8 macro lens), I took the shot above with an ISO of 640, an aperture of f/5.0 and a shutterspeed of 1/125 seconds. I didn't take the time to grab a tripod or external flash, but I did use a small reflector to bounce some light into this spider's eyes. We was on the underside of the fern leaf, so the light wasn't great, but the shot isn't bad considering the low light, hand-held and windy conditions!
Lyssomanes viridis is a translucent green spider found in the southeastern United States from North Carolina to Florida and Texas. [...] This species commonly lives on the tree Magnolia grandiflora. - Richman & Whitcomb
These spiders mostly eat flies, such as syrphid flies and dolichopodid flies. Their legs and body are a pale translucent green, and they have red and white scales on top of their head around the eyes. Males have noticeably long jaws (the spider I found was obviously a male!)
Jumping spiders have excellent vision, with among the highest acuities in invertebrates. The eight eyes are grouped four on the face (the two big Anterior Median eyes in the middle, and two smaller Anterior Lateral eyes to the side), and four on top of the carapace (two medium-sized eyes toward the back, and two very small eyes in front of them). [...] Because the retina is the darkest part of the eye and it moves around, you can sometimes look into the eye of a jumping spider and see it changing color. When it is darkest, you know the spider is looking straight at you, because then you are looking down into its retina. - Jumping Spider Vision