This 5 August 2019 video from England says about itself:
He Spent His Career Studying a Frog. Then He Discovered Its True Identity. | Short Film Showcase
Andrew Gray, Curator of Herpetology at Manchester Museum spent his career studying the Splendid leaf frog. However, when a supposed new species arrived from Central America, he made a shocking discovery. Using the original specimen of the Splendid leaf frog—first collected in 1902—as a comparison, Gray noticed several unique distinctions between the latest arrivals and those he had been studying. These were, in fact, the Splendid leaf frog and the frogs Gray had been studying were the new species.