I was passing by a house on my way to the train station. I noticed that they had built an elaborate addition (すごい追加?）near the entrance of their house
. 
I wondered (不思議がる), what is that for? Someone worked very hard to construct this, but what is it? I asked the man and woman who live there, and they told me that they built it to protect a swallow's nest (ツバメの巣).
They told me that swallows come every year and build a nest near the entrance to their house. But crows come and eat the eggs. (Oh no! I thought I loved crows!) So the husband built this structure to protect the swallow's nest.
There is a small opening that the swallow parents can easily fly in and out of, but crows don't want to enter.
You can see the nest towards the back.
Wow! Does such a kind person exist?!
Are there any birds' nests around your house