Pseudacris (aka Hyla) Regilla Professionals?

[flybyferns]

You might go about it this way ( links below) Especially the 1st link - SSAR
Poke through these ---> contact individuals via email with specific questions regarding current research :
Most researchers are very willing to get back to you. They are very passionate about their work.

Society for the Study of Amphibians and Reptiles – Research, Conservation, Education

Frogs and Toads

NPWRC :: Checklist of Amphibian Species and Identification Guide

CNAH: The Center for North American Herpetology

Have you tried a more local approach ?
Our Northwest Office - National Wildlife Federation

Have fun