I walked over two wetlands bridges every time I approached or left my room (3 or 4 times a day) and thus saw a lot of dragonflies, but sorry to say no really great photos, but they are always interesting! 🙂 And there is no easy way to identify this beautiful creatures. Online websites are conflicting and no dragonfly book for Costa Rica.
Dragonfly 
Red-faced Dragonfly 
Scarlet Skimmer Dragonfly 
Scarlet Skimmer Dragonfly 
Damselfly 
Red-tailed Dragonfly
My CR Dragonfly Gallery has more!
By discovering nature, you discover yourself. ~Maxime Lagacé
¡Pura Vida!
Nice creatures, different colores.
Gracias Arturo.