I have repeatedly observed a small spider or two hanging around the periphery of the web of the large Yellow Garden Orbweaver spiders (Argiope aurantia) that I have been photographing recently. Initially I thought it might be the male of the species, which is considerably smaller than the female, but when I finally took a clear enough photo of one of these small spiders, I realized it was a different species.
My research suggests that this is a kleptoparasitic spider. Let me explain. It may sound like I’m trying to sound like a scientist, but “kleptoparasitism” is a single word that captures the idea that this spider steals or feed on the prey captured by another spider. According to Wikipedia, kleptoparasitic spiders occur in five different families and I am pretty sure the little spider below is of the genus Argyrodes, which are also called dewdrop spiders.
Kleptoparastic spider eyes another spider’s catch
Let me set the scene for you. The much larger Yellow Garden Orbweaver spider caught what looks like a bee and returned to the center of the web, leaving the wrapped bee on the periphery. The little spider moved in and appears to be checking out this potential new food source. Compare the relative size of the spider and the bee—the spider is tiny. That made it tougher to get a clear shot of both the spider and the captured bee. My shot is far from perfect, but it does allow you to see some of the details (and you can get a higher resolution view if you click on the image).
It seems to me that the little spider plays a risky game, living with (and maybe stealing food from) a larger, more dangerous spider. Maybe he’s a thrill-seeker, an adrenaline junkie who enjoys living in a state of constant danger.
© Michael Q. Powell. All rights reserved.
Mike Powell 