71 Things To See At Playa Blanca. This link takes you to a simple online nature guide centered on Playa Blanca. It will give you an introduction to the birds, fish, butterflies and plants you likely will see on a visit.
For a more comprehensive look at the birds, you will want to get A Guide to the Common Birds of Ixtapa-Zihuatanejo, Barra de Potosi and Troncones. Copies are available at Enramda Teresita and Chiminiki’s store (on the right at the entrance to the village Barra de Potosi).