Appearance
Its fur is dark brown; its ears and flight membranes are brown as well. It is similar in appearance to the small-toothed long-eared bat, "Nyctophilus microdon," with which it is sometimes confused. It can be differentiated from "Nyctophilus" species by looking at the skin between the nostrils—in the New Guinea big-eared bat, this skin is hairless, while it has fine hairs in "Nyctophilus". Its forearm length is approximately 39.6 mm. Its ears and tragi are both long, at 24 mm and 15 mm, respectively. Its head and body length is 50.1 mm. Individuals weigh roughly 7.7 g.Naming
Previously, the species was believed to have been extinct since 1890. In 2014, researchers realized that a female bat collected near Kamali in 2012 was a member of this species.Status
In 2020, the IUCN classified this species as critically endangered. The species had not been definitively encountered since 1890. In 2012, researchers rediscovered the species when they captured an adult female, though at first they were unsure which species they had found. Due to its imperiled status, it is identified by the Alliance for Zero Extinction as a species in danger of imminent extinction.Behavior
Little is known about this species, as it is rarely encountered. Based on its large ears, however, it is hypothesized that it might hunt for insect prey using low-intensity echolocation. It possibly captures prey by gleaning, which means plucking them off of a surface rather than aerial pursuit.Habitat
The individual captured in 2012 was in a logged lowland rainforest of the Abau District of Papua New Guinea. Its habitat preference is unknown, but possibly includes lowland sclerophyll woodlands or woodlands with patches of rainforest.References:
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