Reference for Chullin 281:2

מעופפת איצטריך ליה דאפי' כנפיה נוגעות בקן פטור מלשלח

But have we not learnt: IF THE DAM WAS HOVERING OVER THE NEST, AND HER WINGS TOUCH THE NEST, ONE IS BOUND TO LET HER GO? - R'Jeremiah<span class="x" onmousemove="('comment',' So in MS.M. and also in the first version supra; cur. edd. 'Rab Judah'.');"><sup>1</sup></span>