Mustaches are for the birds. Shave your questions, we've already handlebar'd the answers. An inca tern's "mustache" is a sign of health and maturity. The longer the 'stash, the healthier the bird. Before you go stock up on beard balm, consider the tern of phrase, "with great mustache comes great responsibility". #TernAround #IncaTern #EverybirdyDanceNow #sandiegozoo