Wildlife cameraman Simon King has filmed in some odd places, but a motorbike helmet and a peg bag are a bit off his usual beat. To a robin, though, each is an ideal site for setting up home. This irresistible film from BBC Bristol looks at some of the strange places in which birds choose to nest, including a coal lorry, a traffic light and even the top of a kitchen cabinet, and shows why the odd nesting sites often make sense.