Spiny Assassin Bug (Sinea spinipes), taken May 5, 2025, in Georgia, US
Spiny, indeed! Look at those legs! The nymphs of this species are mostly black with a yellow abdomen, quite different from the brown camouflage of adults. If you're not looking closely, adults can be overlooked at a brown spot on leaves or part of tree bark. They're quite good at what they do! I usually only find nymphs, so finding this adult hiding in the leaves was a nice treat!