Conservation of birds is more and more a crucial biodiversity challenge. This film shows that it is possible to re-naturalise areas once devastated by industry thanks to pragmatic initiatives. Astonishing details of our discrete neighbours can be observed during the four seasons unveiling their vibrant life: their struggle for survival in winter conditions; the spring return of the migrants who spent winter down South; the nesting and mating period; the autumnal migrations and winter preparation for those who stay.