These are real taxidermied Greater Short-Nosed fruitbats (Cynopterus sphinx)! They have been mounted to allow for upside-down hanging. These bats are indigenous to the areas of Indonesia, Malaysia, and New Guinea.
They are sustainably hunted by the local peoples as a source of food and income. These bats have been studied and rated a level of "Least Concern" on the IUCN index of endangered/at-risk species due to their high reproductive rate and widespread distribution.
These specimens measure ~5.5" long and are available worldwide!