TREE FROG CHORUS

There is a very distinctive chorus that can be heard each night on the island.  The call of the little tree frog - it starts up each evening as the sun sets and can be heard all night wherever you are.  I think they are delightful, but apparently they irritate some people.  I love listening to them - sounds like a cacophony of whistleblowers.  We have looked for them to no avail - you can hear them loud and clear, but they are very shy, and very small.  Even though the evening light has changed to summertime hours, the orchestra begins in the early evening, reaching full voice once the stars are out.  The chorus continues until early morning providing a melodious wake up alarm.  Even during the day, if it is raining, you will hear the refrain being taken up again - perhaps due to a combination of low light,  and moisture.  Whenever you hear them though - a special and unique sound for Bermuda.

Here is an excerpt I found from a local Bermuda sight - they say it better than I ever could:

"If you have been to Bermuda, you are familiar with the whistling night call of the infamous Tree Frog. Only about the size of a thumbnail, the tree frogs are slight in stature but big in presence. If you are lucky to see one, you will be surprised to discover that such a big noise can come from such a small amphibian.
There are two species of Whistling Frogs (Tree Frogs) in Bermuda. The Eleutherodactylus johnstonei and Eleutherodactylus gossei, the first of the two is more common and smaller while the other has almost disappeared. Both are brownish, nocturnal, living in trees near the ground and by day hiding under stones and leaf litter.
They are one of the most characteristic night sounds of Bermuda between April and November. They can be heard island-wide when the weather is warm enough but are most common in the Parishes of Devonshire, Paget, Pembroke and Warwick.
They are not indigenous – both were introduced accidentally sometime prior to 1880, most likely on orchids imported from the Lesser Antilles. They can be found elsewhere in temperate and sub-tropical regions, but mainly can be found singing loudly at night.
Many visitors are not used to the whistling song, a loud bell-like chorus, of these tiny and harmless creatures. Some visitors say it disturbs their sleep but others love it because it adds a unique sound to the atmosphere. Their song is the sound of males trying to attract females.
Whistling frogs do not require standing water for breeding but pass through their tadpole stage within the egg itself. Clusters of eggs are laid in damp situations among rotting vegetation or under stones."
http://www.bermuda.com/bermuda-tree-frogs/