sazai means "Wren" in English.

sazai written with kanji is 鷦鷯.
This word contains non-jouyou kanji 常用漢字.
sazai written with katakana is サザイ.
sazai written with hiragana is さざい.
Romaji sa za i
Kanji 鷦鷯
School Level ,

sazai may also be written as 三十三才.

Orthography Notes

  • sazai is a jukujikun 熟字訓 reading for 鷦鷯 in this word. That is: those kanji are only read that way when they come together like that.

Further Reading

Wikipedia: ミソサザイ (Wren)