The ecoregion has a humid tropical climate. The slopes of the Central Range above 100 meters elevation include some of the rainiest portions of New Guinea.[6]
Flora
Broadleaf evergreen rain forests cover most of the ecoregion. Alluvial forests lie in the plains, and hill forests cover the foothills of the Central Range. There are smaller areas of semi-evergreen forest, swamp forest, and savanna.[7]
Fauna
The ecoregion has 69 species of mammals, principally marsupials, bats, and murid rodents. There are no strict endemic species. There are 344 species of birds in the ecoregion.[8]
The largest bird in the ecoregion is the flightless southern cassowary (Casuarius casuarius).[9]
Protected areas
A 2017 assessment found that 5,841 km2, or 5%, of the ecoregion is in protected areas. About three-quarters of the ecoregion is still forested.[10]
^Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b. [1]
^Wikramanayake, Eric; Eric Dinerstein; Colby J. Loucks; et al. (2002). Terrestrial Ecoregions of the Indo-Pacific: a Conservation Assessment. Washington, DC: Island Press.
^Wikramanayake, Eric; Eric Dinerstein; Colby J. Loucks; et al. (2002). Terrestrial Ecoregions of the Indo-Pacific: a Conservation Assessment. Washington, DC: Island Press.
^Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b. [2]