In the tranquil Bix valley high up in the Chilterns is an incredible range of habitats sheltering many rare and endangered species. Ancient beech coppice, conifer plantation, flower-studded chalk grassland and even ponds make up this wildlife mosaic.
More than 450 species of plants have been recorded, including 15 species of orchid, an incredible 900 species of fungi and the rare plant Soloman's Seal.
There is a wide variety of all ages and types of woodland within the reserve. Unlike many Chiltern woods which are dominated by beech, Warburg has a greater mix of deciduous and coniferous trees. Oak, hazel, ash, beech, birch, field maple, conifers and many scrub species make up the wooded valley.
There is plenty to see throughout the year. In spring the woodland is awash with spectacular bluebells and wood anemones while in autumn, the coloured leaves of beech and oak and the fantasic display of fungi merit a visit.
Not much grows under the beech trees, but there are some strange and exciting exceptions. In July you can see the yellow bird's-nest, a strange leafless plant, growing in some of the darkest parts of the beechwood. The fragile and rare narrow-lipped helleborine also flowers here.
The reserve is owned by the Berkshire, Buckinghamshire & Oxfordshire Wildlife Trust and is open all year. There is a visitor centre, toilets and a picnic area. For more information go to www.bbowt.org.uk
Small area suitable for wheelchairs. Most paths not suitable for manual wheelchairs. However an off-road mobility vehicle (tramper) is available from the visitor centre.
Berkshire, Buckinghamshire & Oxfordshire Wildlife Trust 01491 642001
Northwest of Henley-on-Thames, Oxon: take the B480, 2nd left after Middle Assendon, follow lane for 2 miles.
Restricted access for dogs.