Red rumped swallow、Kosiaka tsubame,コシアカツバメ

Although I often see swallow around my residence since early spring, this is the first time that I saw Red rumped swallow.

As the letter shows, this bird is red around her waist. 

春先から私が住んでいる界隈でツバメは よく見かけますが、このコシアカツバメ を見たのは初めてです。字のごとく腰の周りが赤いです。