Geese save the Capitol
The tradition is that when the Gauls invaded Rome a detachment in single file clambered up the hill of the Capitol so silently that the foremost man reached the top without being challenged; but while he was striding over the rampart, some sacred geese, disturbed by the noise, began to cackle, and awoke the garrison. Marcus Manlius rushed to the wall and hurled the fellow over the precipice.