Monteverde Cloud Forest
That being said - unfortunately no - I have yet to see any animals like birds, snakes or monkeys. I've highlighted what I have found in the ones explored so far - mind you it has taken me three Saturdays to explore them! Each have amazing fauna and flora however some offered more scenery than the other. On all three Saturdays I was enveloped in huge thick clouds so I didn't get all the views I was hoping for.
Pointers:
*Go early
*Layer up - you're in a cloud forest so the weather tends to change pretty abruptly
*Bring water and snacks if you get hungry easily
*Be in moderate physical/health conditions (meaning you can walk for long periods of time without getting winded)
Santa Elena Reserve (also a Cloud Forest)
I've given pointers below, but as I stated from the beginning you must be a true nature lover to really appreciate this one.
Pointers:
*Go early
*Wear layers
*Be patient
*Bring water and snacks if you get hungry easily
*Be in shape