Not great shots, but I wanted to post these shots of some trapjaw ants, Odontomachus erythrocephalus. While taking the first photos of my trip, I knelt down on a log on the side of the trail in order to steady my camera. A few seconds later, I was stung by one of these guys on the inside of my knee. Turns out they had a nest in that log, and they weren’t happy about being disturbed. They don’t seem to like to expose themselves though, and I had a hard time trying to photograph them once they painfully made me aware of their presence.
Reference: Key to Costa Rican Odontomachus