This week's highlighted birding t-shirt is actually a twitching t-shirt. You've heard of witchcraft, but have you heard of Twitchcraft?
Twitching is a method of birding by which birdwatchers follow tips and sighting reports in order to see rare birds. Sometimes twitching is also used to generically describe British birders. This fun twitching-themed t-shirt design reads Practiced in the art of Twitchcraft.