Category: Mammals
One of the most common of North American bats, this species belongs to the genus known as “mouse-eared bats.” Little brown bats are not true hibernators, since they will emerge from their torpor on warm days in winter to hunt for insects who have also emerged as a result of warmer temperatures. Since many of their insect prey (such as mosquitos and mayflies) have aquatic life cycles, these bats prefer to roost near water. These bats are considered valuable to agriculture, since they eat many species of agricultural pests.
The age-defying Brandt’s bat
In most mammals, larger size correlates with longer lifespan, but that is not the case with the Brandt’s bat, who can live up to 41 years and weigh less than 0.28 ounces! These bats resemble larger, longer-lived mammals in that they mature slowly and have fewer offspring – but the size difference is dramatic: a female Bonobo lives for approximately 40 years as well, but she outweighs the Brandt’s bat by a factor of 3,771! Oddly enough, it is suspected that the mutated gene that causes the bat’s dwarfish size is the same one that leads to its long lifespan. Studying animals with unusual longevity like the Brandt’s bat does more than just satisfy our curiosity, it could lead to longer, healthier lifespans for humans and other animals!
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