Commentary for Niddah 48:32

אמו טמאה לידה

its mother is unclean by reason of the birth, for it is a child, but it has wings. So it was also taught: R. Jose stated, It once happened at Simoni<span class="x" onmousemove="('comment',' Semunige in Lower Galilee. ');">²⁷</span>

Rashi on Niddah