/tags/passenger-pigeon passenger pigeon en-US Copyright Thu, 04 Feb 2016 10:00:00 GMT /news/2016-02-04/extinct-pigeon-guides-researchers-in-quest-to-save-other-animals A bird species called the "passenger pigeon" that became extinct more than 100 years ago, is helping researchers learn how to save other animals.… Thu, 04 Feb 2016 10:00:00 GMT /news/2016-02-04/extinct-pigeon-guides-researchers-in-quest-to-save-other-animals Debbie Holmes