Gaer Wood is a Site of Special Scientific Interest (SSSI), noted for its biological characteristics, in Monmouthshire, south east Wales.
Geography The SSSI, notified in 1981, is located within the community of Trellech United, south of the town of Monmouth.Ordnance Survey: Explorer map sheet OL14 Wye Valley & Forest of Dean The woodland is privately owned.
Wildlife and ecology As with other woodland in the Wye Valley Area of Outstanding Natural Beauty, Gaer Wood contains many local and rare tree species. The main species found in the wood are common ash (Fraxinus excelsior), field maple (Acer campestre) and wych elm (Ulmus glabra), along with localised occurrences of beech (Fagus sylvatica).
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