page_title: Hibernaculum (zoology)
section_title: Bats
hierarchical_section_title: Hibernaculum (zoology) / Mammals / Bats
caption_attribution_description: English: A photograph of a Columbian Ground Squirrel emerging from its burrow. Taken in Roger's Pass, Canada.
context_page_description: A hibernaculum plural form: hibernacula is a place in which a creature seeks refuge, such as a bear using a cave to overwinter. The word can be used to describe a variety of shelters used by many kinds of animals, including insects, toads, lizards, snakes, bats, rodents, and primates of various species.
context_section_description: Bats favor larger hibernacula where large groups may roost together, including natural caves, mines, cellars, and other kinds of underground sites and man-made structures, like ice-houses. Within these hibernacula, the bats are still highly tuned to environmental factors. Little brown bats in northern latitudes hibernate for up to eight months during the winter, and leave their roosts in the warm spring weather when insect prey is plentiful again. Bats gauge the outside temperature by being attuned to the airflow at the hibernacula entrance, which is driven by temperature differences between inside and outside the hibernacula, allowing bats to leave when the temperature begins to warm. Some hibernacula are shared between multiple species, such as common pipistrelles roosting with soprano pipistrelles. Behavior other than hibernating can also occur at hibernacula; common pipistrelles produce most of their mating calls and mate with each other in and near their hibernacula.
caption: Columbian ground squirrel outside its burrow hibernaculum
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