Aspects of this topic are discussed in the following places at Britannica.
...and fly from the cave exit well before nightfall. Should they be too early, their internal clock may be reset. A few species of bats, including a flying fox (Pteropus samoensis), the yellow-winged bat (Lavia frons), and the greater sac-winged bat Saccopteryx bilineata, may forage actively during the day, but little is yet known of their special...
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