YOU SAID:
wiggly wobbly birds fly through the window
INTO JAPANESE
ぐらついたぐらついた鳥が窓を飛んでくる
BACK INTO ENGLISH
A wandering bird flies through the window
INTO JAPANESE
うろつく鳥が窓から飛んでくる
BACK INTO ENGLISH
Wandering birds fly in through the windows
INTO JAPANESE
さまよえる鳥は窓から飛び込んでくる
BACK INTO ENGLISH
Wandering birds fly in through the windows
That didn't even make that much sense in English.