Challenging hibernation limits of hoary bats: the southernmost record of Lasiurus cinereus hibernating in North America
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Challenging hibernation limits of hoary bats: the southernmost record of Lasiurus cinereus hibernating in North America Ganesh Marín1,2 · Daniel Ramos‑H1 · Daniela Cafaggi1 · Cárol Sierra‑Durán1 · Alejandra Gallegos1 · Aarón Romero‑Ruiz1 · Rodrigo A. Medellín1 Received: 10 July 2020 / Accepted: 15 October 2020 © Deutsche Gesellschaft für Säugetierkunde 2020
Abstract It has been suggested that Lasiurus cinereus cinereus migrates from summer roosts at higher latitudes to the coastal regions and southern latitudes in the United States and Mexico to overwinter, where little is known about its winter ecology. We found a hoary bat in a shrub in a conifer forest at high elevation in central Mexico in November 2019. We installed a camera trap and recorded it was hibernating for at least 12.7 days. Our record is by far the most southern hibernation location of tree bats in North America and it shows L. cinereus is capable of hibernating in a non-typical roost. We also open the possibility that camera traps may provide an additional, practical, and easy-to-use tool to study bat hibernation. Our finding expands the ultimate questions of why and where hoary bats decide to hibernate, migrate or both. Keywords Camera-trap · Central Mexico · Hibernation · Hoary bat · Non-typical roost · Tropic The North American subspecies of hoary bat Lasiurus cinereus cinereus (Chiroptera, Vespertilionidae) is distributed from Canada to northern Guatemala (Shump and Shump 1982; Gonzalez et al. 2016). This subspecies resides mainly in temperate forests, where it typically roosts singly in the foliage of conifer and deciduous trees (Shump and Shump 1982; Perry and Thill 2007; Klug et al. 2012). In Mexico, occurrences of L. cinereus are distributed all across the country, except in the Baja California Peninsula and Yucatan Peninsula (Gonzalez et al. 2016), and this species occupies a wide variety of ecosystems (Navarro-Frías et al. 2007; Morales et al. 2014).
Handling editor: Danilo Russo. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s42991-020-00080-4) contains supplementary material, which is available to authorized users. * Daniel Ramos‑H [email protected] 1
Laboratorio de Ecología y Conservación de Vertebrados Terrestres, Instituto de Ecología, Universidad Nacional Autónoma de México, Coyoacán, Mexico City, Mexico
School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, USA
2
Despite hoary bats being widely distributed in North America, there is a remarkable deficit of information about where they go and what they do during the winter (Cryan et al. 2014). Monthly occurrence records (Cryan 2003) and stable isotope analysis (Cryan et al. 2014) suggest that this subspecies migrates from inland summer roosts within USA and Canada to the coastal regions and southern latitudes in California and Mexico to overwinter. It has been suggested that this seasonal migration to warmer regions allows them to remain activ
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