The reserve is an important although isolated cloud forest which supports a number of faunal species including some endemics.

The reserve receives 2,400 millimetres (94 in) of mean annual rainfall with rain falling on 211 days of the year.

[1] Endemics of Calophyllum walkeri, Syzygium rotundifolium, Elaeocarpus montanus are the common floral species of the reserve.

[3] Sri Lanka leopard, fishing cat, wild boar, Sri Lankan sambar deer, grizzled giant squirrel, red giant flying squirrel, and pungent pipistrelle are some of the other mammals found in the reserve.

[1] Notable reptiles include Uropeltis melanogaster, Rhinophis blythii, Aspidura brachyorrhos, A. trachyprocta, Hypnale nepa, geckos such as Calotes nigrilabris, Cophotis ceylanica, rhino horn lizard, and skink species Sphenomorphus striatopunctatum.

[4] One study conducted within the reserve has revealed that soil toxicity is a probable cause of forest dieback.