Insectivorous bats require different resources for diurnal roosting and nocturnal feeding, and sound conservation planning requires knowledge of both. However, ranging behavior and habitat use by foraging bats are poorly known, especially within urban ecosystems. We studied foraging flight behavior and use of an urban landscape by 14 white-striped free-tailed bats (Tadarida australis) in metropolitan Brisbane, Australia. Each evening, the bats emerged from day-roosts in tree-hollows and commuted rapidly to a feeding area (median travel speed 42.9 km/h, based on net distances moved during 10–20 min). Within 30 min from emergence their travel speed was greatly reduced (median 6.7 km/h) to a level that remained similar throughout subsequent hours while they foraged. Day-roosts were widely dispersed across the urban landscape, but foraging bats mostly restricted their movements to a localized area of a few kilometers diameter. This area was closer to a communal roost, visited periodically by all bats, than to their day-roosts (median distance from foraging bats to the communal roost 2.5 km; to their day-roosts 6.2 km). The bats showed a significant preference for foraging above floodplain habitat, and did not prefer to feed above remnant forest. T. australis appears tolerant of deforestation and capable of persisting in urban landscapes, provided that roost trees are protected. However, it remains unknown whether a sustained availability of aerial prey depends on floodplains remaining undeveloped.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.