Audubon publishes journalism, photography, and illustrations to "to celebrate the joy and wonder of birds and to inform its readers about the natural world, inspire them to care passionately about that world, and motivate them to take action on its behalf." They prefer freelancers to write articles up to 1,200 words. They pay $0.50 to $1.50 per word. They particularly like if there's a "solutions" element. To learn more, read their pitching guide here.