Editing Biriwal Bulga National Park (section)

== Biology and ecology ==

=== Fauna ===
[[File:Koala.jpg|thumb|The koala, a native to Biriwal Bulga National Park]]
Seventy-four fauna species have been recorded in the area.<ref name=":0" /> Amongst these seventy-four species; according to NSW National Parks and Wildlife Service,<blockquote>“the following are recorded as vulnerable and at risk of becoming endangered: [[powerful owl]], glossy black cockatoo, [[fruit dove]]s, spotted-tailed [[quoll]], brush-tailed phascogale, [[yellow-bellied glider]], koala, long-nosed potoroo, [[common bent-wing bat|large bent-wing bat]]”.<ref name=":0" /> </blockquote>The most common are koalas. There different sub-species of koalas which interact with the natural flora forming the ecosystem within the park.<ref name=":4" /> These sub-species often roam and move from neighbouring regions into the park.<ref name=":4" /> An estimated 500-1000 individual koalas are recorded throughout the Biriwal Bulga region.<ref name=":4" />

=== Flora ===
Sixteen types of plants have been recorded within Biriwal Bulga National Park.<ref name=":0" /> The predominant plants are dry [[sclerophyll]] forests. During its early discovery, the park was subject to selective logging for businesses due to its dense forests.<ref name=":2" /> The logging caused forest destruction and disturb the natural ecosystem of the park.

The 1950s brought an end to all logging in the parkand since, the majority of forest has been restored.<ref name=":2" /> The [[Gondwana Rainforests|Central Eastern Rainforest Reserves of Australia]] (CERRA) World Heritage Area has identified the park as a potential addition to its list as a development listing due to its undisturbed and intact rainforest.<ref name=":6">Briggs, J.D and Leigh, J.D. (1996) rev.ed. Rare or Threatened Australian Plants. CSIRO, Canberra.</ref> As of 2004, there were no recorded threatened plant species.<ref name=":6" /> ''[[Plectranthus| Plectranthus suaveolens]]'' is listed as the only rare plant found. The plants listed as endangered by the NSW Wildlife Services are vine ''([[Cynanchum elegans]])'' and ground orchid '' ([[Diuris flavescens]])''<ref name=":0" />''.''

=== Catchment ===
Biriwal Bulga National Park drains the majority of its rainfall into surrounding creeks which eventually lead to the [[Hastings River]].<ref name=":3" /> The main nearby body of water is the [[Doyles River (New South Wales)|Doyles River]], which is approximately 6&nbsp;km in length.<ref name=":3" /> This is found on the south-eastern border of the park. Inside the park are two catchments of water, Green Gully Creek and Big Creek.<ref name=":3" /> The water that leaves the park supplies stock on some downstream farms and partially supplies Port Macquarie.<ref name=":0" />