Hedgerows Near Brecon Beacons National Park, WalesPhotograph by Sam AbellA wide hedgerow, growing thick with hawkweed, borders a field in south Wales, near Brecon Beacons National Park. Besides serving as a fence between properties and supporting dozens of species of flora and fauna in their densely planted rows, hedgerows knit together disparate fields into a picturesque quilt of undulating fields.