Esgyrn Bottom

Esgyrn Bottom is a Site of Special Scientific Interest (or SSSI) in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1957 in an attempt to protect its fragile biological and geological elements. The site has an area of 49.9 ha and is managed by Natural Resources Wales.

Type
This SSSI has been notified as being of both geological and biological importance.

It has three special features.
 * Raised bog
 * Rare mosses and liverworts including: Sphagnum magellanicum and Sphagnum fuscum, and the liverworts Pallavicinia lyelii (veilwort) and Cephaloziella elachista
 * Glacial meltwater channel and associated deposits