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Wallace Line
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== Zoogeography == The distributions of many bird species follow the limits of the line, since many birds do not cross even the shortest stretches of open ocean water. Among mammals, [[bat]]s have distributions that can cross the line, but larger terrestrial mammals are generally limited to one side or the other. On the Australian side, many species of marsupials are present, and some monotremes, alongside native rodents—although the occurrence of rodents in this case is derived from more recent colonization events.<ref name="Ali-Heaney-2021" /> By contrast, to the Asian side, marsupials are excluded, and placental mammals such as apes, cats, elephants, monkeys, rhinoceroses, and other species are found.<ref name="Ali-Heaney-2021" /> Exceptions to this include [[macaque]]s, pigs, and [[tarsier]]s on Sulawesi. Other groups of plants and animals show differing patterns, but the overall pattern is striking and reasonably consistent. [[Flora]] do not follow the Wallace Line to the same extent as [[fauna]], since their colonization events differ in their ability to spread across bodies of water. One genus of plants that does not cross the line is the Australasian genus ''[[Eucalyptus]]'', except for one species, ''[[Eucalyptus deglupta|E. deglupta]]'', which naturally occurs on the island of [[Mindanao]] in the Philippines.<ref name="Wallace-1863" />
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