Slievenacloy contains a number of different habitats, namely species-rich grassland, wet heathland, rush pasture, fen, bog and streams. Northern Ireland has lost over 95 per cent of its species-rich grassland in the last 50 years, so places such as Slievenacloy are important refuges for biodiversity, with many species making their homes there. Visit the site in spring to see a number of ground nesting birds such as skylarks and snipe. In summer butterflies and moths may be found feeding on the orchids and wildflowers found in profusion across the site. In autumn the brightly coloured waxcap fungi may be seen.