Princeton Hydro's biologists and ecologists conduct surveys for suitable habitat and population presence or absence for a variety of federal and state-listed Threatened and Endangered species. Additionally, we routinely couple our in-depth understanding of the life history requirements of particular species and guilds into our design of habitat restoration and mitigation sites.

Species, guilds, and habitats that we address include:

• Bog Turtle (Glyptemys muhlenbergii)
• Swamp Pink (Helonias bullata)
• Northern Pine Snake (Pituophis m. melanoleucus)
• Timber Rattlesnake (Crotalus horridus)
• Barred Owl (Strix varia)
• Colonial Wading Birds
• Other Bird, Reptile, and Amphibian Species
• Plant Communities
• Vernal Habitats