You can find this educational panel at our Dorothy McIlroy Bird Sanctuary, and you can download it here.
Download: Fens, Swamps, and Marshes (PDF)
Excerpt:
The combination of kame and kettle glacial geology, elevation, calcium-rich waters, and cool temperatures is responsible for the unusual wetland plant communities found here, including a rich shrub fen. The plant life more indicative of northern climates, pockets of deeper water, and dead snags for cavity nesters create a mosaic of habitat types that supports a high diversity of nesting birds.