6.3 Urban development
Although the protection of natural communities in Nature Reserves and National Parks is most important, there are many types of plants and animals which have successfully adapted their way of life to man-made habitats.
Flowers such as rosebay willow-herb, dandelion and ragwort thrive in well- drained areas such as railway yards, docksides and building sites. In the hearts of many large cities, a few specimens of lichens and mosses are usually to be found growing on roofs and walls.
Many animals eat food left by man; quite complex food-webs exist in and around rubbish dumps. Foxes, rats, and herring gulls are amongst the animals found in such places. Birds such as starlings, jackdaws, and house sparrows nest in and around buildings. Birds of prey are sometimes found nesting close to the centre of cities, using large office-blocks as though they were cliffs. They feed on rats, mice and pigeons.