The answer to 'why is my bee nests' is that you likely have a bee hive or nest located on your property. Bees will build nests in areas that provide shelter and food sources, such as in trees, under eaves, or in other protected spaces around your home.
Common symptoms include seeing a large number of bees flying around a specific area, hearing buzzing noises, or spotting the actual hive or nest structure. Bees are generally not aggressive unless their nest is threatened, but it's still important to avoid disturbing the nest directly.