Hayberries is a reclaimed sand and gravel quarry which is now a haven for wildlife. parts of the quarry cliff have been retained and put to good use by a colony of sand martins which arrive from Africa at the end of march. They set up home by burrowing into areas of hard sand found along the old quarry face to the west of the site. This part of the site is fenced to prevent disturbance to the birds. Please do not climb over the fence, the sand martins can be seen quite easily from the car park as they collect nesting material. The sandy soil is a rare habitat which contains specialist plants as well as invertebrates such as solitary bees and wasps. The grassland has many native species of wildflowers colonising the bare ground. Of particular note are a number of rare flowers of the Alchemilla family, commonly known as Lady's Mantle, some of which are only found in County Durham. The ponds attract large numbers of frogs and toads during the breeding season, along with many aquatic plants and insects. The woodland at the eastern end of the site is mainly sycamore with a few old oak and elm trees. You may see a variety of birds including long-tailed tits, woodpeckers, tree-creepers and heron. Buzzards circle the skies above, along with curlew and lapwing.