[3] Wye Valley Woodlands/ Coetiroedd Dyffryn Gwy are recognised as a Special Area of Conservation (SAC) under the EU Habitats Directive.

[4][5] There are eight separate units of assessment for this collection of woodlands which are in the Wye Valley Area of Outstanding Natural Beauty.

[1] The Hudnalls is on steep slopes which face north and west, being valley sides along the River Wye, and a tributary, the Mork Brook.

[1] Old Red Sandstones, quartz conglomerate and other material contribute to the soil make-up which is mostly acidic.

Thus the rock formations and types of soil, together with how the area has been managed historically over the years, has contributed to the creation of one of the most interesting and diverse locations.

In these woodlands a fern called Gymnocarpium dryopteris is recorded which is close to the southern limit of its geographic range.

There are few shrubs growing in this part, but the ground flora is plentiful and includes yellow archangel and wood fescue.