At first glance, the potter wasp appears to be riding a broomstick. But this industrious insect isn't flying back to stir its witch's cauldron, or playing Quidditch. It's carrying a caterpillar – prey to feed its young. It was captured by macro wildlife photographer Bidyut Kalita and was among the highly commended entries in this year's Wildlife Photographer of the Year competition. The winning images will be announced on 14 October, followed by an exhibition at the Natural History Museum, showcasing 100 standout photographs from around the world.