With an Orange-Tufted Spiderhunter, Birder Breaks Record for Sightings

On Feb. 9, Peter Kaestner stood in the shadow of majestic Tinuy-an Falls on the Philippine island of Mindanao, on the cusp of a record he’d spent seven decades chasing and worried that he’d arrived too late.For years, nobody alive had seen and identified more bird species than Mr. Kaestner. A retired American diplomat, he is birding’s ultimate “big lister,” a star of the small but growing subculture of…