"Something is rotten in the state of Denmark" - Golden toad, Bufo periglenes

The case of the golden toad was an eye-opener - at least for scientists throughout the world. About 165 amphibian species have become extinct in the past hundred years, while another 250 have gone missing. And the same fate is in store for many others. The golden toad was a relatively slender toad, measuring about 5 cm. There was a pronounced difference between the genders. The females weren’t just around a centimetre longer and bulkier than the males, their colour difference was so pronounced that it’s hard to believe they even belonged to the same species. They had a very small range of less than 10 square kilometres in the extremely damp and cool cloud forest in the mountains of Costa Rica. The animals spent most of the year hidden away underground. They only emerged at the beginning of the rainy season, coming together to mate by small pools of water, where the females would deposit clutches of 200-400 eggs. The species presumably became extinct in 1989.