This creepy pink creature in our fanart Centaurworld cursor pack is one of the message birds, prematurely-hatched baby birdtaurs introduced in Season 2 of Centaurworld. The older birdtaurs use them to communicate with their social group via tweeted messages. Message birds effectively serve as both background characters and items. These strange birds are a clear nod to social media, specifically Twitter, as later confirmed by the show's creator.
