photo by Franco Bakker: Eleutherodactylus johnstonei (familie Eleutherodactylidae)
Fluitkikker / boomkikker: Eleutherodactylus johnstonei (familie Eleutherodactylidae)
Thie whistling frog sounds and looks like: THIS on youtube.
More of this Frog on this site.
Cuban tree frog
Op You Tube te horen.