Agalychnis callidryas the famously over-photographed Red-eyed Tree Frog, or Red-eyed Leaf Frog. This female was photographed a long time ago at the OTS Finca La Selva Biological Station near Puerto Viejo de Sarapiqui in Costa Rica. As strikingly brilliant as it's red eyes may be, vocally this is a most unimpressive frog--as it's dry weak "cluck" sound confirms, you can't have everything. http://www.costaricanfrogs.com/