[1] The principal canopy trees in this forest community are Sydney blue gum and blackbutt which are usually seen between 20 and 40 metres tall.

The Blue Gum High Forest is restricted to the northern parts of Sydney, on soils based on shale with an annual rainfall over 1100 mm (43 in).

Also it was recorded on soils based on the Mittagong Formation, volcanic diatremes and exposed shale lenses within the Hawkesbury Sandstone.

[2][2] Due to fragmentation and the surrounding urban area, the forest remnants are constantly under threat from invasive plant species.

[4] Birds include rainbow lorikeet (Trichoglossus moluccanus), Australian king parrot (Alisterus scapularis), crimson rosella (Platycercus elegans), currawongs, variegated fairywren (Malurus lamberti), black-faced cuckoo-shrike (Coracina novaehollandiae), superb fairywren (Malurus cyaneus), powerful owl (Ninox strenua),[2] glossy black cockatoo (Calyptorhynchus lathami) and silvereyes.