National Geographic-Lindblad Expeditions naturalists are seasoned experts who know the areas they explore like the backs of their hands. But even with their deep knowledge of every corner, they can still be surprised and delighted by rare sightings, from seldom-seen birds such as the vermillion flycatcher in the Galápagos Islands or the common potoo in Costa Rica to an unusually large jellyfish beneath the surface of the Atlantic in the Falkland Islands. Get Inspired By Photos, Videos, Webinars, Stories, And Exclusive Offers. Sign Up