[11] A species of Saccolaimus with dark hoary grey fur for across the back, the colour is darkest at the head and shoulder, the ventral side is pale buff-grey.

[12] They resemble another species also found in Australia S. flaviventris, which is discernible by its greater size, darker pelage and the presence of a developed throat pouch in the female.

[9] S. mixtus is associated with forest of western Queensland dominated by the stringybark Eucalyptus tetrodonta, and is recorded in small groups occupying dead specimens of that tree.

[9] Surveys undertaken in Australia have suggested evidence of a greater range than was previously established, extending the area it may occur to southern parts and western regions of Cape York and at islands to the north.

[12][1] The IUCN notes the population of Saccolaimus mixtus as declining and is classified as near threatened by habitat loss in 2017, the work group amending the previous listing as data deficient in 2008.

The effects of land clearing and other ecological changes in New Guinea had not been assessed, but are intensive at the type locality around Port Moresby, and new records in the decades preceding the reassessment were absent.