The Porcupine has been a symbol used by Libertarians since at least the 1970s. The popular explanation has been that it is an animal that has weapons used only in defense (i.e., its quills) rather than in aggression as emblematic of the Non-Aggression Principle. The national Libertarian Party officially adopted the porcupine as its campaign emblem to be used similarly to the elephant and donkey on September 13, 2020 in a motion put forward by the National Secretary Caryn Ann Harlos. See also George Quillies.
The porcupine symbol has been around since at least the 1970s.
In 1978, the Fairbanks Libertarian Party had a float in a local parade in which they used a Libertarian porcupine while the local Democratic Party and Republican Party had a donkey and an elephant, respectively.
In March 1983, the Montana Libertarian Party's publication was called the Porcupine. In a December 1987 article in the Arkansas Gazette, the porcupine was referred to as the Libertarian Party's mascot.