While habitat loss or alteration through deforestation, fragmentation, or irresponsible tourism is the largest threat to bats at a global scale, pressure is being placed on bat populations through many other sources as well, and the slow reproductive rates of most bat species exacerbate the impacts of these pressures. 

Severe weather events such as heat waves triggered by climate change have led to large-scale death across many bat species and populations, and climate change could also cause phenology mismatches between migratory bat species and their food resources. In addition, wind energy threatens many migratory populations due to collisions between bats and turbine blades. Killing by humans either for food or due to fear also threatens species persistence. Finally, disease presents a major threat to bat species, and the severity of this threat is evident in the impacts being seen from white-nose syndrome.

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