Midori

I thought that Midori meant beautiful bird.

Midori can also be written with the kanji for 'beautiful' (mi) & 'bird' (tori/dori) meaning 'beautiful bird' as seen in the animanga series, Midori no Hibi. I`ve seen this name be written more commonly as 'green' though & some people with this name also write it with the hiragana & katakana system.