Large flying fox fox was one of the many mammal species originally described by Linnaeus in the landmark 1758 10th edition of his "Systema Naturae", receiving the name "Vespertilio vampyrus". The large flying fox is among the largest species of bat. It weighs and has a wingspan of up to . Its head-body length is . As with all megabats, it has a fox-like face, hence its name. It lacks a tail and has pointed ears. The hairs on much of its body are long and woolly, but are shorter and more erect on the upper back. The mantle hairs tend to be
Rennell flying fox 1962, Hill published that he considered Rennell's flying fox as a subspecies of the Solomons flying fox, with a trinomen of "Pteropus rayneri rennelli". The forearm of the holotype was long. The fur of its back is uniformly brownish, with the fur of its neck and face lighter. Females give birth to one offspring per litter, with the young called a "pup." Its lifespan is estimated at 8–9 years. It is nocturnal, roosting in sheltered places such as trees during the day. Individuals roost by themselves. It is only known from Rennell Island, which is part of the Solomon Islands.