Twitcher/ˈtwɪtʃər/ Definition 1 of 2Pro Tip 1/3Birding Hobby Used in contexts relating to birdwatching hobbies and activities. As a twitcher, Chloe spends weekends at the nature reserve. Pro Tip 2/3Special Interest Often implies a keen interest in finding and observing rare or specific birds. The twitcher was thrilled to spot the elusive snow bunting. Pro Tip 3/3Travel Aspect Can involve traveling to see a rare bird that's been sighted. He's a dedicated twitcher who flew to Alaska for the peregrine falcon.