About every other night, we took a night hike through the rainforest with miner-style head lamps (ran on four C or D cells, so much brighter than the standard REI headlamp). We were on the lookout for anything cool we could see, and we managed to spy lots of snakes (even some poisonous ones), spiders, cicadas, and lots of cool things. Notably, one night, we came across two red-eyed tree frogs (excuse the weird neon, but that's the female we caught) in amplexus, which basically means they were having sex.
As was also the custom during our trip, we grabbed the pair and put it in a ziploc bag. We collected any (non dangerous) unusual animals that we came across so we could photograph them the next day.
Despite disturbing them and sticking them in a bag, they still managed to finish the deed and lay eggs by the next morning. Our professor deposited the eggs in a usual red-eyed tree frog laying site and released the frogs after our pictures. I thought the whole thing was rather nifty.
Today, in my searching for graduate schools, I came across some recent research being done by a woman with whom I'd like to study. Karen Warkentin at Boston University is studying early hatching due to vibrational movements; turns out that the eggs hatch up to three days early if attacked by a predator, such as a snake. Even if you're not interested in the topic per se, go see the cool picture at the link. Nothing neater, as a researcher, than seeing actual photographic proof that a snake attack will make tadpole eggs hatch.