Whilst the human population of Britain kicks back, summer is boom time for the animals. More sun means more food, but animals are arriving from afar to share, and competition is high. Hunters time their arrival from Africa to feast on the huge glut of flying insects, hobbies race after dragonflies, and thermal cameras reveal nightjars on a Dorset heath. Will the weather hold? One day harmful UV rays force sea urchins to cover up; the next, thunderstorms bring out hordes of hungry snails.