Dear Robin,

If you are in the San Juan area here are two very good local guides. They may recommend others.
Carlos Ruiz cruizlebron at gmail.com
Gloria Archilla maryarena at gmail.com

Sergio Colon is the expert near Arecibo wetlands (787)347-1571. sergiocolon at yahoo.com
These two below have also done a lot of professional guiding over the years:
Jose Salguero jsalguero at csagroup.com
Julio Salgado velezjulio0 at gmail.com

I don't know Hilda Morales of Adventours Puerto Rico (http://www.adventourspr.com/). But have seen good reviews.

eBird has really taken off in Puerto Rico. So whether you find a guide or not, check eBird during your visit there.

We have converted our book for Puerto Rico birds to an app for Apple and Android with photos and audio of all species on the island, plus a self guided tour for the southwest of the island.
Search in app store for All Birds Puerto Rico, Virgin Islands & northern Lesser Antilles

Mark Oberle
Port Orchard, WA
oberle at mindspring.com
www.puertoricobirds.com