Principe scops owl
Scientists thought this bird was there since 1928.  They became pretty sure it was there in 1997.  In July 2016, someone took a photograph of an unknown Otus owl on Príncipe. The image was published on Ornithomedia. People had heard Otus owls calling there since the early 1900s, but no one had been sure.  In 2022, scientists caught a few owls and wrote the first formal paper describing it.  They named it Otus bikegila. In 2022, scientists wrote the first paper saying exactly what it looked like.