 The Nightcap Range IBA includes Nightcap NP, Mount Jerusalem NP, Goonengerry NP and Whian Whian State Conservation Area (SCA).It has been recognised for its populations of Albert's lyrebird "(Menura alberti)", green catbird "(Ailuroedus crassirostris)", pale-yellow robin "(Tregellasia capito)", Australian logrunner "(Orthonyx temminckii)", paradise riflebird "(Ptiloris paradiseus)" and regent bowerbird "(Sericulus chrysocephalus)".Approximately 70% of Nightcap NP is covered by a variety of rainforest communities, and the rest is covered by mostly wet sclerophyll forest and partly dry sclerophyll forest.