Steve Brown explores Elmley Nature Reserve on the Isle of Sheppey, where swallows and swifts are gathering in their hordes, heralding the arrival of summer. Margherita Taylor is on the hunt for an invasive species of moth that threatens not just the oaks on London's Hampstead Heath, but walkers too. On his farm, Adam Henson's horses get their hooves checked and he catches up with trainer Jonjo O'Neill to see how his racehorses are coping with life off the track.

Anita Rani visits Epping Forest to find out about its past, its wildlife and to meet some of the people who look after it. She also discovers the art of `cattle whispering" when she meets the herd of longhorns that help to conserve the Forest and, at dusk, she's on the trail of one of the UK's rarest creatures. Wildlife film-maker Hamza Yassin gets up close to a much-loved seabird, the puffin, near his home on the west coast of Scotland, while Gareth Wyn Jonesoffers a glimpse into his life as a hill farmer in Wales. Down on his own farm, Adam Hensonhas a shearing dilemma to solve.