No one would ever have thought of teaching, or probably could have taught, the tumbler-pigeon to tumble-an action which, as I have witnessed, is performed by young birds, that have never seen a pigeon tumble.
Inork ez zuen inoiz pentsatuko uso itzulipurdikariari itzulipurdiak egiten irakasterik, eta ziurrenik irakatsi ere ezin izanen zion, eta, hala ere, ekintza hau, neuk ikusia dudan moduan, inoiz itzulipurdika usorik ikusi gabeko banako gazteek egiten dute.