Bat Seen Flying During the Day
Although bats are nocturnal creatures they do sometimes emerge to hunt for insects during the day.
This is more common on mild winter days or during the early spring when bats wake naturally from hibernation and come out to stock up their reserves and hunt insects that may also have emerged because of the mild weather. After this they go back to their hibernation site to sleep until the next mild spell.
If the weather is very bad then bats will not go out at night to feed; so if there has been a period of bad weather, bats will sometimes risk hunting during the day in order to get enough food.