The dusky flying fox (Pteropus brunneus), also known as the Percy Island flying fox, is an extinct species of flying fox in the Pteropodidae family. It was endemic to Percy Island off the southeast coast of Mackay, Queensland, in the northeast corner of Australia.Only one specimen is known to exist. It was collected in 1859 and documented by Dobson in 1878. Since that record, no further documentation is known of this species.