chiropteran

Chiropteran is a term used to describe bats or, more broadly, anything pertaining to the order Chiroptera of mammals. The word comes from Greek cheir (hand) and pteron (wing). In zoological usage, chiropteran can function as both an adjective (chiropteran species) and a noun (a chiropteran).

Members share a characteristic adaptation: forelimbs modified into wings with a thin skin membrane (patagium) stretched over elongated finger bones; a calcar at the hindlimb supports the wing as well. The wing membranes may extend to the hind limbs and tail, forming an uropatagium. Most species are capable of powered flight; flight performance varies across lineages. Echolocation is common among many small insectivorous bats, using calls produced by the larynx; some megachiropterans rely primarily on vision and smell and do not echolocate.

Taxonomy and diversity: The order Chiroptera is divided into two major suborders in modern classifications: Yinpterochiroptera and Yangochiroptera, reflecting deep evolutionary splits; older systems used Megachiroptera and Microchiroptera. There are about 1,400 described species, found worldwide except extreme polar regions and dozens of remote islands. Diets are varied, including insectivory, frugivory, nectarivory, carnivory, and hematophagy in a few species (vampire bats).

Ecology and behavior: Bats roost in caves, trees, buildings, and other sheltered locations. They are mostly nocturnal and often form large colonies. Reproduction is generally seasonal; most species give birth to a single pup, though twins occur rarely. They provide important ecosystem services such as insect suppression, pollination, and seed dispersal.

Conservation and threats: Bats face habitat loss, disturbance of roosts, disease (notably white-nose syndrome in North America), climate change, and wind turbines. Because of their ecological roles, bat populations are subject to conservation efforts in many regions; protecting roosting sites, hibernacula, and forage habitats is important for their long-term survival.