Eastern red bat
|Eastern red bat|
Taxonomy and etymology
It was described in 1776 by German zoologist Philipp Ludwig Statius Müller. He initially placed it in the genus Vespertilio, with the name Vespertilio borealis. It was not placed into its current genus Lasiurus until the creation of the genus in 1831 by John Edward Gray. Its species name "borealis" is Latin in origin, meaning "northern." Of the species in its genus, the eastern red bat is most closely related to other red bats, with which they form a monophyly. Its closest relatives are the Pfeiffer's red bat (Lasiurus pfeifferi), Seminole bat (L. seminolus), cinnamon red bat (L. varius), desert red bat (L. blossevillii), saline red bat (L. salinae), and the greater red bat (L. atratus).
The eastern red bat has distinctive fur, with its back brick red or rusty red and frosted with white. Individual hairs on its back are approximately 5.8 mm (0.23 in), while hairs on its uropatagium are 2.6 mm (0.10 in) long. Fur on its ventral surface is usually lighter in color, while the shoulders may appear white. Females are usually lighter in color than the males. Its entire body is densely furred, including its uropatagium. It is a medium-sized member of its genus, weighing 7–13 g (0.25–0.46 oz) and measuring 109 mm (4.3 in) from head to tail. Its ears are short and rounded, with triangular tragi. Its wings are long and pointed. Its tail is long, at 52.7 mm (2.07 in) long. Its forearm is approximately 40.6 mm (1.60 in) long. Its dental formula is 126.96.36.199, for a total of 32 teeth.
The aspect ratio and wing loading of eastern red bat wings indicates that they fly relatively quickly and are moderately manoeuvrable. Eastern red bats are insectivorous, preying heavily on moths, with other insect taxa also consumed. They consume known pests, including gypsy moths, tent caterpillar moths, Cydia moths, Acrobasis moths, cutworm moths, and coneworm moths.
Range and habitat
The eastern red bat is widely distributed in eastern North America and Bermuda. It generally occurs east of the Continental Divide, including southern Canada and northeastern Mexico. In the winter, it occurs in the southeastern United States and northeastern Mexico, with greatest concentrations in coastal areas. In the spring and summer, it can be found in the Great Lakes region and the Great Plains region. Unlike the closely related hoary bat, males and females have the same geographic range throughout the year. Formerly, some authors included the western United States, Central America, and the northern part of South America in its range, but these populations have since been reassigned to the desert red bat, Lasiurus blossevillii.
The eastern red bat is evaluated as least concern by the IUCN, the lowest-priority conservation category. It meets the criteria for this designation because it has a wide geographic range, large population size, it occurs in protected areas, it tolerates some habitat disturbance, and its population size is unlikely to be declining rapidly. Eastern red bats and other migratory tree bats are vulnerable to death by wind turbines via barotrauma. The eastern red bat has the second-greatest mortality from wind turbines, with hoary bats most affected. While it has been documented carrying the spores of Pseudogymnoascus destructans, the fungus that causes white-nose syndrome, no individuals have been observed with clinical symptoms of the disease.
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- "Bats affected by WNS". White-Nose Syndrome.org. US Fish and Wildlife Service. Retrieved 2017-12-12.
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