Fall Bat Removal in Utah: The August–October Window

August 15 is one of the most important dates on a Utah homeowner’s bat calendar. It marks the end of the maternity season restriction and the start of fall’s prime exclusion window.

Why Fall Exclusion Works So Well

• Pups are fully mobile: All juvenile bats born in May–June are now flying and exiting nightly — exclusion captures the complete colony including this year’s young
• Legal window reopens August 15: UDWR maternity restriction lifts statewide
• Maximum colony size present: Fall reveals the true scope of your bat problem before winter dispersal
• Breaks the return cycle: Bats return to the same roost every spring — fall exclusion breaks that cycle before next year

The Fall Exclusion Calendar

Window	Status	Recommendation
Aug 15–Sep 30	Full colony present, all mobile	Best window — act immediately
October	Colony begins pre-hibernation movement	Still effective — schedule ASAP
November+	Some species leave for hibernation	Winter exclusion still viable

Fall vs. Spring: Which Is Better?

Both are excellent. Fall advantage: largest colony captured, summer guano visible for cleanup planning. Spring advantage: earlier in year, more scheduling flexibility. Best answer: whichever one you actually schedule today.

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