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Nephila clavipes
The venom of the golden silk orb-weaver is potent but not lethal to humans. It has a neurotoxic effect similar to that of the black widow spider; however, its venom is not nearly as powerful. The bite causes local pain, redness, and blisters that normally disappear within a 24-hour interval. In rare cases, it might trigger allergic reactions and result in respiratory troubles (in asthmatics) or fast-acting involuntary muscle cramps. As the genus possesses relatively strong chelicerae, the bite could leave a scar on hard tissue (such as fingers).
Hmm, this is definitely a Nephila species, but because I can't see the colors, I can't give you a species level ID. :) Still, Nephila sp. is a good start! The common name is Golden orb weaver.