The file comprises miscellaneous articles, 1957-1989, on the seasons at Ynys-hir, birdwatching in Wales, particularly on Bardsey Island, individual bird species, such as swallows, marsh and willow tits and woodlarks, migratory birds, nature conservation in Wales, red squirrels the wildlife of historical sites and conifer forests, with relevant correspondence, lists of photographs and captions to accompany the articles.