Swallows are migratory birds that come to Japan from spring to summer.
Swallows build nests in private houses and raise children.
Also, in Japan, it has long been valued as a symbol of "prosperity of business" Also eating pests and protecting agricultural products.
However, not only is it good, swallows nest under the eaves of their homes. There are also hygienic problems due to the droppings and mud that fall from the nest.
How to clean?
You can keep it clean by placing old newspapers under the nest and replacing or cleaning it.
Finally, If you see a swallow, They don`t attack us. So please want to gently watch over it.