Personalized Nerd Birdwatcher Blue Youth Long Sleeve T-Shirt. Funny Youth Long Sleeve T-Shirt - White for birders, birdwatchers and twitchers for their Big Day or Big Year with binoculars and bird graphic says This Nerd Watches Birds. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)