Bluebells & Greater Stitchwort at Cwm y Wydden Nature Reserve

Bluebells & Greater Stitchwort at Cwm y Wydden Nature Reserve © MWT/Tammy Stretton

Wood Warbler (Phylloscopus sibilatrix) in sessile oak forest Wales © Andy Rouse/2020VISION

Wood Warbler (Phylloscopus sibilatrix) in sessile oak forest Wales © Andy Rouse/2020VISION

76 fungi/lichens
251 plants
405 insects
42 birds
Wild and mysterious - for over 400 years there has been a continuous cover of trees in this quiet part of the Welsh countryside, creating a micro jungle, packed with wildlife.

Location

Berriew
A static map of Cwm y Wydden

Know before you go

Size
4 hectares

Parking information

none

Grazing animals

none

Walking trails

NO PUBLIC ACCESS due to dangerous conditions

Access

NO PUBLIC ACCESS due to dangerous conditions

Dogs

No dogs permitted

When to visit

Opening times

NO PUBLIC ACCESS

Best time to visit

NO PUBLIC ACCESS

About the reserve

Cwm y Wydden is a small area of ancient woodland supporting a great diversity of wildlife. The wood scrambles up steep slopes, either side of a small stream, like a jungle in miniature - a real Welsh rainforest!

Areas of reduced light and increased humidity encourage a wealth of ferns, lichens, moss and liverworts. Sessile Oak, birch and Hazel provide most of the tree cover. Breaks in the canopy let enough light in for spring flowering woodland plants like Bluebell, Common Dog-violet, Primrose and Wood Anemone, in some areas, whilst Bilberry and Common Cow-wheat carpet the floor elsewhere.

Responding to this diversity are the myriad of animals, including iconic spring migrants like Pied Flycatcher and Wood Warbler.  The real abundance shows in the large number of different insects and other invertebrates living there, well over 400 of them! The Purple Hairstreak butterfly is one such species, an oak feeding species, rarely seen. But it is the invertebrates associated with the dead wood which are really special. Of particular note is a tiny fly, known only as Pseudopomyza atrimana, which is a nationally rare, endangered species only found at 5 sites in the whole of the UK; Cwm y Wydden is it's only known Welsh site.

Cwm y Wydden Nature Reserve is a site for wildlife - there is no public access. Steep slopes, difficult terrain and abundant deadwood make the site too dangerous.

Contact us

Montgomeryshire Wildlife Trust
Contact number: 01938555654
Contact email: info@montwt.co.uk