Longevity Records and Notes on Tooth Wear of Bats

Abstract
The longevity of bats has recently been discussed by Cockrum (1956), including records of 14 years for Myotis lucifugus and five years for Myotis keenii. Our studies of hibernating bats in New England during the winter of 1955–56 have established significant new longevity records for these two species. One female Myotis lucifugus banded in April, 1936, in a cave in Plymouth Union, Vermont, was recovered in November, 1955, in the same cave. This bat would have a minimum age of 20.5 years, since the young of these bats are born in the summer months. Several hundred Myotis lucifugus were banded during the winter of 1936–37 in a mine tunnel in Chester, Massachusetts ( Griffin, 1940a, 1940b, 1945). The colony in this mine tunnel was studied in detail during the winter of 1955–56 ( Hall, 1956). Two male...

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