I Don't Get Twitching!

The press (http://www.shieldsgazette.com/news/Twitchers-flock-to-Shields-to.5761237.jp) seem to have been fascinated by the flocks of 'twitchers' that have accumulated in South Tyneside's Trow quarry with their telescopes and cameras to catch a glimpse of a solitary Eastern crowned warbler (Phylloscopus coronatus). This biological phenomenon was apparently triggered by the telephone and the internet in response to a bird that is normally found in the Far East and has only been sighted in Europe on 4 occasions. I'm sure that it is nice to tick off another species of bird but I really can't see the biological significance. It seems to me that such sighting involve animals that have blown or wandered off course (there is a remote possibility that some are escapees from collections). The bird is unlikely to find itself in a habitat where it can display its normal behaviour and the situation is likely to quickly prove terminal. Is this 'animal train spotting' or is that too harsh?