Downy birch (B. pubescens) is a native species prevalent across the island of Ireland. Birches are light-demanding pioneer species that are able to quickly regenerate in an area opened by felling or fire owing to their prolific seed production and rapid juvenile growth. Downy birch will tolerant higher altitudes and more compacted, wetter and exposed sites. The species is highly shade intolerant and will only grow well as widely spaced and dominant trees.
