Geese can be nasty. There's a famous story in Livy about how they helped defend the Capitoline fortress in Rome from besieging Gauls who had defeated the Romans on the Allia around 390 BC. [1] It made an impression on the Romans at least, who were not easily impressed but also enjoyed a good yarn.

[1] https://en.wikipedia.org/wiki/Battle_of_the_Allia#Account_of...