Night hikes are amazing, especially in the Osa Peninsula.
Glass grasshopper are see through, and initially look like spiders.
A glass frog, carefully watching her eggs. The eggs will drop one by one into the water below and once they are all in the stream she will leave her leaf.
A walking stick, the first one I have ever seen in the wild. It was about 6 inches long.
A wolf spider, very different from the ones in California. About 15 years I killed a wolf spider when I was sleeping by crushing it in my hand. I woke up, turned on the light and saw huge harry legs sticking out between my fingers. Good thing it wasn't a costa rican wolf spider!
Now we are talking... poison dart frog. They are called dart frogs because they were used by indigenous people to poison their arrows.
Red eyed tree frog.
What a successful hike, I couldn't have asked to see more (well, maybe a pit viper would have been nice...)