British amateur naturalists go on the trail of bats, hares and dormice.
Britain's green army of wildlife watchers are on the lookout for bugs.
We meet the amateur naturalist who has turned his garden into a lizard empire.
Amateur naturalists get to grips with Britain's birds, taking their passion to extremes.
A look at four enthusiasts immersed in the colourful world of butterflies and moths.
A look at the passions of four intrepid people who study coastal creatures.
