To make the marathon journey to the Arctic, birds need physical stamina. Although most Arctic birds are only physically in the Arctic for the breeding season, they spur the success of plants by pollinating flowers and dispersing seeds. The Prince Creek birds provide definitive evidence that birds bred in the Arctic during the Cretaceous. Thanks to these anatomical innovations, the Prince Creek birds (apart from the flightless hesperornithines) would have been capable of flying great distances to the Arctic to breed. Our work on the Prince Creek birds is not over yet.