[2] About 44 different species groups inhabit the area including various land and aquatic plants, fish, insects, crustaceans, lichen, fungi, terrestrial mammals and birds.

[4] Formerly in the ownership of the Trawsgoed Estate, and the Earl of Lisburne, the bog is located in the 2,000-acre (8.1 km2) Cors Caron National Nature Reserve.

The river terraces associated with the component bog mesotopes are regularly flooded and support vegetation that includes reed canary-grass Phalaris arundinacea, soft rush Juncus effusus, purple moor-grass Molinia caerulea and, more rarely, water sedge Carex aquatilis.

Substantial areas of the surface of each of the three component bogs still retain good quality active raised bog vegetation mainly referable to NVC type M18 Sphagnum papillosum – Erica tetralix community, with frequent bog-rosemary Andromeda polifolia and white beak-sedge Rhynchospora alba and, more locally, the bog-mosses Sphagnum magellanicum and S. pulchrum.

Extensive areas with a high cover of heather Calluna vulgaris and deergrass Trichophorum cespitosum are also present, while purple moor-grass M. caerulea is particularly prominent on the more modified bog margins.

Cors Caron was additionally assessed as possessing the following qualifying, non-priority habitats: Transition mires and quaking bogs described as: The term 'transition mire' relates to vegetation that in floristic composition and general ecological characteristics is transitional between acid bog and 7230 Alkaline fens, in which the surface conditions range from markedly acidic to slightly base-rich.

In other cases these intermediate properties may reflect the actual process of succession, as peat accumulates in groundwater-fed fen or open water to produce rainwater-fed bog isolated from groundwater influence.

The vegetation is typically very open, usually characterised by an abundance of white beak-sedge Rhynchospora alba, often with well-developed algal mats, the bog moss Sphagnum denticulatum, round-leaved sundew Drosera rotundifolia and, in relatively base-rich sites, brown mosses such as Drepanocladus revolvens and Scorpidium scorpioides.

The nationally scarce species brown beak-sedge Rhynchospora fusca and marsh clubmoss Lycopodiella inundata also occur in this habitat.

Visitor facilities at Cors Caron include three car parking areas, accessed from the B4343 road between Tregaron and Pontrhydfendigaid.

Alongside the reserve is a cycle path using the disused trackway of the former Aberystwyth to Carmarthen railway, which forms part of the Ystwyth Trail.