1. people who engage in birdwatching, especially those who travel long distances to see rare birds
Usage: British informal
2. people or things that twitch or make jerky movements

Examples

• The twitchers gathered at dawn hoping to spot the rare warbler.
• A group of dedicated twitchers drove three hours to see the vagrant bird.
• The birdwatching community includes both casual observers and serious twitchers.
• His hands were twitchers when he got nervous.
• The twitchers in the audience made it hard to concentrate during the performance.
• She joined the local twitchers on their weekend birding expedition.