What bird hass the world's longest feathers? Why didn't the chicken cross the road? Because it's feathers were 34.75 feet long. Back in 1972 in Japan someone bread an ornamental chicken of which the tail feathers measured 10.59 meters or 34.75 feet. The longest feathers for a wild bird belong to the Crested Argus Pheasant whose tail feather commonly reach just under six feet.