noun. One that twitches.

noun. A bird watcher, especially one who observes rare birds.

noun. One who or that which twitches.

noun. plural Small pincers.

noun. An instrument used for clinching hog-rings.

noun. One who, or that which, twitches.

noun. Someone or something that twitches.

noun. An eager birdwatcher who is willing to travel long distances to see rare species.

"In the same way that a sprinter is an athlete, but an athlete is not necessarily a sprinter, a twitcher is a birdwatcher, but a birdwatcher is not necessarily a twitcher."