I don't think there's any official merchandise for Berdly on a shirt, so I made one myself. There's barely any merch of him at all, so as one of those fans that obsess over a (sorta??) obscure character, I just... gotta have fun usin' my resources.
Visual Description: A t-shirt with Berdly laying down in just his feathers, smiling and lounging casually, with the text "BERDLY" above him in pixels, and "Bird Nerd" in cursive under him.