Personalized Nerd Birdwatcher Blue Youth T-Shirt. Funny Youth T-Shirt - Heather for birders, birdwatchers and twitchers for their Big Day or Big Year with binoculars and bird graphic says This Nerd Watches Birds. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.