The Hyrcanian Forests form a unique forested massif that stretches along the Caspian Sea in Azerbaijan and Iran. The history of these broad-leaved forests dates back 25 to 50 million years, when they covered most of this Northern Temperate region. Their floristic biodiversity is remarkable with over 3,200 vascular plant species documented. To date, 180 species of birds typical of broad-leaved temperate forests and 58 mammal species have been recorded. Elements of the property comprise full ecosystems including top predators such as leopard, wolf and brown bear, and the forest has a high degree of rare and endemic tree species. The oldest trees seen here are 300-400 years old, with some possibly up to 500 years old.

Brief synthesis The Hyrcanian Forests form a green arc of forest, separated from the Caucasus to the west and from semi-desert areas to the east: a unique forested massif that extends from south-eastern Azerbaijan eastwards to the Golestan Province, in Iran. The Hyrcanian Forests World Heritage property is situated in Azerbaijan and Iran, within the Caspian Hyrcanian mixed forests ecoregion. It stretches approximately one thousand kilometres along the southern and south-western coast of the Caspian Sea and covers around 7% of the remaining Hyrcanian forests in Iran. The property is a serial site with 17 component parts shared across three Provinces (Gilan, Mazandaran and Golestan) in Iran and across two Districts (Lenkoran and Astara) in Azerbaijan and represents examples of the various stages and features of Hyrcanian forest ecosystems. Most of the ecological characteristics of the Caspian Hyrcanian mixed forests are represented in the property. A considerable part of the property is in inaccessible steep terrain. The property contains exceptional and ancient broad-leaved forests which were formerly much more extensive however, retreated during periods of glaciation and later expanded under milder climatic conditions. Due to this isolation, the property hosts many relict, endangered, and regionally and locally endemic species of flora, contributing to the high ecological value of the property and the Hyrcanian region in general. Criterion (ix): The property represents a…