Fat-Bottomed Spider Ladies

In the spider world, big girls really ARE beautiful. Male¬†Nephila clavipes (golden orb-weaving spiders) on search for mates choose the biggest female they can find, preferring to duke it out with other males than search for an unclaimed lady-friend. Our project in Corcovado had to do with feeding different-sized prey to different-sized female Nephila, as well as counting the numbers of “kleptoparasites” (little spiders that steal prey from the big spiders’ webs) and males each female was hosting in her web.¬†

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They’re beautiful to watch as they build webs and snare their prey… but they’re fraidy-cats when it comes to anything bigger than this cicada. Still, that’s an impressive predator-prey size ratio. This big girl sure can handle herself. Watch out, spider-boys…