area of wet woodland providing a rich habitat for many species. Water quality is sufficient to support various fish species. The river above Welbeck Lake provides habitat for a significant population of wild brown trout. The size of the lakes results in water moving much more slowly and supports populations of cyprinids, pike and eels, which thrive in water which is relatively static. The lower reaches of the river are used for spawning by fish which inhabit the River Idle. The lakes provide habitat for large numbers of birds. Clumber lake is fringed by alder, sallow and ash trees, with some sedge marsh. It was one of the first sites in the country used by gadwall for breeding, and also has a winter population of goosander. Hobbys frequent the reed bed below Clumber Dam in August and September, where they hunt swallows and martins. The upper lake is fringed by oak, yew, beech and Scots pine trees, and provides habitat for willow tits and woodpeckers, with blackcaps visiting in the summer. Mandarin ducks also visit occasionally. Points of Interest Bibliography References External links Poulter 2Poulter