By Liz Kimbrough “We did it!” Doka Nason shouted as he stared at the screen of a camera trap in Papua New Guinea. He and his team had just captured a long-sought image: that of the black-naped pheasant-pigeon (Otidiphaps nobilis insularis). Believed to be extinct, this rare ground-dwelling bird was photographed as part of the Search for Lost Species program. Scientists hadn’t seen one in the wild for 140 years. Lost species are those that haven’t been observed by scientists in their natural habitat for at least a decade. Yet most have been missing for around 50 years on average, according to a…