What does a name 'Twitcher' mean?

A "twitcher" is a term primarily used in the UK to describe an avid birdwatcher who is particularly enthusiastic about spotting rare or unusual birds. The term is derived from the excitement and urgency that such birdwatchers often exhibit when they hear about a rare sighting, prompting them to "twitch" or rush to the location. Twitching can involve traveling long distances to observe specific bird species, often accompanied by a sense of competition among enthusiasts.