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. 

It's advisable to avoid using harmful methods to eliminate birds. Poisoning birds is inhumane and can have unintended ecological consequences, affecting other wildlife and pets. Similarly, using firearms or other lethal means poses safety risks and could be illegal in many areas. Sticky substances like adhesives can cause birds to become trapped and injured. Lastly, playing excessively loud or distressing noises can stress birds and humans. Focusing on humane and environmentally responsible strategies is essential when dealing with bird issues.

Small amounts of geese are actually good for the environment. They help spread seeds and lead to more plant growth, but they’re often an invasive species, particularly Canadian geese. This means a small gaggle can quickly grow into a level that litters your lawn with bald patches and excrement.

Both spikes and loose nets can be installed over nest sites to prevent the bird from returning, but nets are not a humane option since birds and other wildlife can get tangled in them. 

Spikes are a humane alternative that deter nesting without harming the birds. In small areas, like vents, a very fine mesh net can be installed to prevent the bird from returning. These nets don't generally pose a risk to the birds.