An evocative look at the wildlife of a typical English river through the eyes of a family living beside it. Wildlife cameraman Charlie Hamilton James, his wife - TV presenter Philippa Forrester - and their three young boys spend a year documenting the wildlife in and around the Halcyon River, which flows beside their house in the West Country. The result is a charming family-friendly series full of fascinating wildlife footage, surprises and a great deal of fun as cameras capture a river otter hunting at night, a mallard mother frantically protecting her ducklings from an attack, the water vole - the fastest declining mammal in the UK - and an adulterous kingfisher. The family's observational experiments also produce remarkable results as cameras wired to a moorhen's nest reveal the chicks' desperate fate; the world's first underwater bird table shows dippers hunting for submerged prey and by looking after an injured kingfisher, they discover the difficulties of survival on the river. In four episodes spread across the seasons, 'Halcyon River Diaries' reveals the excitement, drama and secrets of the wildlife of an ordinary British river.