When is the best time to bat-proof according to the material?

When is the best time to bat-proof according to the material?

• A. Late fall after bats have left for hibernation or in late winter and early spring before bats arrive
• B. Mid-summer
• C. Early spring only
• D. During peak roosting in June

Answer: (A)

The best time to bat-proof is when bats aren’t inside the structure, so you can seal entry points without disturbing roosts or harming pups. In Michigan, bats hibernate in winter and return to roost in late winter/early spring, with maternity colonies forming in late spring and summer. Therefore, the ideal window is after they’ve left for hibernation and before they arrive to establish new roosts—late fall after hibernation or late winter/early spring before they come back. This timing minimizes disruption and makes exclusion work effective. Mid-summer isn’t good because bats are actively roosting and pups are present, so excluding then can trap young or harm roosts. Early spring only may be too narrow a window if bats are just arriving. Excluding during peak roosting in June is impractical and disruptive to active colonies.

The best time to bat-proof is when bats aren’t inside the structure, so you can seal entry points without disturbing roosts or harming pups. In Michigan, bats hibernate in winter and return to roost in late winter/early spring, with maternity colonies forming in late spring and summer. Therefore, the ideal window is after they’ve left for hibernation and before they arrive to establish new roosts—late fall after hibernation or late winter/early spring before they come back. This timing minimizes disruption and makes exclusion work effective.

Mid-summer isn’t good because bats are actively roosting and pups are present, so excluding then can trap young or harm roosts. Early spring only may be too narrow a window if bats are just arriving. Excluding during peak roosting in June is impractical and disruptive to active colonies.