Why are bat exclusion treatments limited to the time frame of Mid-August to Mid-May?

The time frame for bat exclusion treatments being limited to Mid-August to Mid-May is primarily designed to avoid trapping bats inside structures. During this period, bats are typically in a safe state of hibernation or are less active, which helps ensure that any bats present are not inadvertently excluded from their roosts during critical times. If exclusion is performed outside this window, particularly during the late spring and summer months, bats may become trapped inside a building, leading to potential harm to the animals and complicating removal efforts.

The other options, while they may have some relevance, do not directly address the significant concern of preventing harm to the bats through improper exclusion practices. Minimizing disturbance in non-nesting seasons, while important for the welfare of wildlife, is not the primary reason for the specific exclusion timing. Reducing the risk of attracting predators is less of a consideration in the context of exclusion methods. Compliance with wildlife regulations is certainly a factor in wildlife management, but the direct motive tied to the timing is focused squarely on the safety and well-being of the bats.