This depends on if their needs are being met. They'll likely return night after night if they have access to food, water, and adequate shelter. If this changes, they’ll look for another roosting spot. This is why bright lights and other dissuading factors often work when removing bats from a property.

You can take multiple approaches to keep animals out of your edible landscape. You can use natural repellents such as mint and cayenne pepper to deter them from your garden. You can also build a fence (or opt for a privet hedge) or keep the most enticing plants in a sectioned-off area. The most efficient method of keeping your four-legged guests at bay is to determine what animal it is and create a customized plan for them. 

Numerous predators kill hornets, including frogs, birds, lizards, bats, spiders, and hedgehogs. Some larger predators, including rats, skunks, and racoons, will occasionally attack a hornet nest in order to eat the larvae inside. These natural predators typically don’t eat enough hornets to make them an effective form of hornet control. 

Keeping your pool cover clean is a good way to keep smaller animals from running across it or using it as shelter. Small animals may use leaf debris on top of the cover to hide. Cleaning also removes nuts that may fall from a nearby tree that could otherwise be a tempting snack for some animals, like squirrels.