Forget your Formula 1 or the All-Ireland - these guys chase around looking for 'half a bird'.
This is the annual Dublin Bird Race where 'twitchers' or birdspotters try to spot as many species in a day.
Terry Flanagan goes along. Guess how many they spot in a day, 10, 30, 50? No, much much more.
The race is organised by Birdwatch Ireland
Music used: "Anna" from 'The Happiness Project' by Charles Spearin
The Curious Ear is produced by Ronan Kelly firstname.lastname@example.org