The Lee Valley is a habitat for many birds. Some of the birds live here for only part of the year and spend the rest of their time in other countries. Birds migrate for food, climate, to mate and to find safe places to build nests and raise their young. Migrating birds navigate using the Sun and the stars, Earth’s magnetic field, physical landmarks, and their own mental maps. They don’t have signs that tell them where to go like humans do. As a way for us to imagine the navigational challenges that the birds face we have made a series of signs for them. The signs can be found around Coppermill Lane on the approach to the Walthamstow Wetlands.