Reference for Chullin 113:3

ההוא צנא דאינקורי דאתיא לקמיה דרבא בדקיה רבא בצומת הגידין ואכשריה

A basket full of birds, each bird having its legs broken,<span class="x" onmousemove="('comment',' . According to Jast. 'a bird with traces of bites or wounds on its legs'. Rashi gives as a second explanation of this word, which he quotes as the view of the Geonim, viz., 'black birds with white spots on their heads'.');">¹</span>

Jastrow