Serotine bats

The genus Eptesicus, commonly known as serotine bats, belongs to the order Chiroptera and the family Vespertilionidae. It is critical to note that these animals are not plant pests; they are strictly insectivorous and provide significant ecosystem services by predating on various crop-damaging insects.

In an agricultural setting, serotine bats are primarily beneficial. They help regulate populations of agricultural pests, including nocturnal moths and beetles. However, they may occasionally inhabit barns, silos, or warehouses, creating potential sanitation concerns for stored products.

The biology of Eptesicus includes a cycle of nocturnal hunting and seasonal hibernation. Throughout their active season, they consume vast quantities of insects, significantly reducing the pressure of pests on surrounding fields without causing any direct damage to the vegetation or the crop yield.

The perceived harm caused by these bats is limited to the accumulation of guano in enclosed spaces where agricultural commodities are processed or stored. This accumulation can be a concern for food safety and storage hygiene, requiring structural management of the facilities to keep the animals out.

Management strategies focus on physical exclusion rather than lethal control, which is often prohibited by conservation laws. To protect facilities:

• Seal all structural gaps and roof entry points during the bat's active season.
• Install fine-mesh screening on ventilation points to prevent roosting.
• Maintain storage areas clean to reduce the attractiveness of the site as a shelter.