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Sphecotypus niger, Finca Heimatlos, Ecuador
"Guys look at me, I'm an ant. Just like you! Want to hang out?"
Only noticed the oddity back home, when zooming. This is a jumping spider mimicking a Hairy Panther Ant (Neoponera villosa). This is what the real ant looks like, photographed a few days earlier:

Some ant-mimicking spiders aim to blend in with ants in order to prey on them, but that's not what's happening here. It's mimicking an ant known to have a very painful sting, and this away it avoids predation.
Great photos and info on several ant-mimicking spiders:
https://www.alexanderwild.com/Ants/Natural-History/Ant-Mimics/
Sphecotypus niger is a corinnid sac spiders in the Sphecotypus genus. It mimics the Neoponera villosa ant.
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