Egyptian fruit bat

}} The Egyptian fruit bat was described as a new species in 1810 by French naturalist Étienne Geoffroy Saint-Hilaire, who gave it the name Pteropus egyptiacus. He later revised the specific epithet to ægyptiacus, given as 1812 In 1992, G. B. Corbet and J. E. Hill argued that Geoffroy's revision from egyptiacus to ægyptiacus was invalid according to the ICZN Code, and changed the name back to egyptiacus. The 1999 Mammalian Species review used egyptiacus as well. He notes that aegyptiacus was "accepted almost universally by the scientific community", emphasizing its use by Andersen in 1912. Kock also writes that since the Latin adjective for "Egyptian" is aegyptiacus, egyptiacus is a simple misspelling in the original description. Books like Mammal Species of the World (2005) and Mammals of Africa (2013) follow Kock and use the name aegyptiacus. Subspecies There are six subspecies of Rousettus aegyptiacus. ==Description==

, in Turkey. The Egyptian fruit bat is considered a medium-sized megabat. Adults have an average total body length of and an average wingspan of about . Its forearm length is and its thumb length is . Adults weigh . Males are larger than females and can be easily distinguished by their large scrotums and the prominent, stiff strands of hair around their throats. It has a dental formula of for a total of 34 teeth. The fur on its body is relatively short and consists of soft and sleek strands. On its back, the fur's coloration ranges from dark brown to gray-brown, while the coloration on its underside is pale brown with a yellowish-brown collar around its neck. Its wings are of a darker brown than its body and the wing membranes attach to the leg at the first toe. Males and females have similar coloration. Similar to other megachiropteran species, the Egyptian fruit bat only has claws on its first and second digits, while the other digits have extremities made of cartilage. The Egyptian fruit bat has one of the greatest ratios of brain weight to body weight of any bat species. It is well adapted to seeing in low light and possesses a highly developed sense of smell. The regions of the brain associated with sight and smell are similarly well-developed. Its eyes are large and well-developed, while its ears are considered medium-length. As in all megabats, the choroid of the eye (vascular region between retina and sclera) has tiny projections known as papillae, which is where its photoreceptor cells are located. ==Distribution and habitat==

The Egyptian fruit bat is extensively dispersed across various locations and occurs throughout Africa, the Middle East, Pakistan and northern regions of the Indian subcontinent. In the Mediterranean region, it occurs on the mainland coast of Turkey and the island of Cyprus. It is the only frugivorous bat species in Europe. Outside of its natural distribution, an Egyptian fruit bat was observed in the Greek island of Kastellorizo during a zoological expedition in 2017. Usually, the Egyptian fruit bat inhabits tropical rainforests, savannas, or other forests, and tends to live in large colonies that consist of thousands of individuals in their established roosts. When no caves are nearby, it establishes roosts in cave-like human structures, such as abandoned depots and hangars. ==Behavior and ecology==

, England Diet and foraging The Egyptian fruit bat is frugivorous, consuming mostly fruit, flower, in Tanzania The Egyptian fruit bat usually makes multiple, short flights from its roost to various fruiting trees. It prefers to pick fruit and carry it back to the roost or another tree before eating it. Egyptian fruit bats are ecologically important as pollinators or seed dispersers for many species of trees and plants. The baobab tree, for instance, relies almost exclusively on fruit bats to pollinate its flowers. Mating, reproduction and life cycle The Egyptian fruit bat has two breeding seasons: the first is from April to August, while the second season is from October to February. When the breeding season begins, the bats within the colony separate based on sex. The males gather together to form bachelor groups while the females form maternity colonies. By allowing the female to scrounge, it strengthens the bond between the pair, thus increasing the probability of the female copulating with a given male. Newborn Egyptian fruit bat pups are altricial at birth with their eyes shut until they are nine days old. They only become independent from their mothers after nine months, once they have finally reached their adult physique. Offspring typically stay with the same colony as the parents for their entire lives. The significant difference between the lifespan of Egyptian fruit bats in the wild versus ones in captivity is mostly because of the wild bats' increased exposure to predation and vitamin D deficiency. this has been questioned. A few other megabat species echolocate via creating clicks with their wings. The clicks are normally slow and constant, but speed up dramatically when the bat approaches an object. This allows it to effectively navigate in darkness. It also makes use of a range of vocalizations for communication, including grunts and screeches, to communicate with other bats within the colony. As a result, a large roosting colony can be a deafening cacophony. Additionally, according to several studies, it is thought that because of their constant exposure to thousands of other individuals, they can form their own language to interact with one another about specific topics such as food. Colonies of Egyptian fruit bats develop their own dialects, producing sounds at different frequencies. Egyptian fruit bat pups acquire the dialect of their colonies by listening to their mothers' vocalizations. ==Relationship with humans==

As pests Since fruit bats also eat commercially grown fruits intended for human consumption, many of them are poisoned or otherwise persecuted and eliminated by farmers to prevent crop loss. It has been documented with antibodies against Ebola virus in its blood, known as being seropositive, but has not tested positive for the virus itself. Evidence that it or any other megabat species is the natural reservoir of Ebola virus is "far from decisive". In captivity The Egyptian fruit bat is well represented in zoos around the world. As of 2015, there were 616 Egyptian fruit bats housed in twenty-three Association of Zoos and Aquariums (AZA) member facilities, slightly more than 5% of all captive bat individuals of twenty-eight different species. In the future, the AZA emphasized the need to ensure that males are rotated among facilities to promote genetic variation within the captive population. Captive individuals are susceptible to hemochromatosis (iron overload), necessitating further research into the dietary risk factors for this condition, as well as general nutritional requirements for the Egyptian fruit bat. Given that the Egyptian fruit bat is highly adaptable, there are concerns that, through the pet trade, it could become an introduced species in the Southern US, competing with native animals and causing destruction to fruit agriculture. They are especially suitable for this kind of research, because they use visual inputs in conjunction with echolocation to navigate. which are cells that track their location, as well as head direction cells, which track the orientation of their head. Friedrich Loeffler Institute (FLI) in Germany, Centers for Disease Control and Prevention in Atlanta, GA, and Colorado State University (CSU) in Fort Collins, CO have Egyptian fruit bat colonies. These bats are born and bred in biolab captivity for infection research. According to FLI, Egyptian fruit bats are a "reservoir host" and "useful model" for SARS-CoV-2 research, "although this species is certainly not the original reservoir of SARS-CoV-2 because these bats are not present in China, the epicentre of the pandemic." ==References==