|Antillean White-lipped Frog (Leptodactylus albilabris)|
Here is a series of the rapid "pip" calls from the southern slopes of El Yunque on the main island of Puerto Rico. These are the calls of the frog shown in the photo above.
This frog would occasionally interject his almost incessant "pip-pip" calls with a faster trill of "pips".
© Chris Harrison 2013