The Dyfi Biosphere, designated in 1977, is the first in Wales. The extent of the reserve itself was extended and redefined in 2009. This involved including Aberystwyth as a major town. It has an active bilingual community of around 26,000 inhabitants and is comprised of various areas of importance, notably the Dyfi estuary (area A) which forms one of the most important wildfowl and shorebird centres in Wales. Cors Fochno or Borth Bog (area B) is one of the largest and finest examples of a raised peat bog in Britain, and Coed Cwm Einion, which has has remnants of native oak woodland (area C). However, most of the Dyfi Biosphere is not a conservation area, simply places where people live and work.