An “ecological Swat team” has discovered 20 previously unknown species in the misty cloud forests and cascading waterfalls that flank Bolivia’s Zongo valley. Among the animals found were a minuscule 10mm-long frog, a pit viper, two metalmark butterflies and an adder’s-mouth orchid. The pristine forests are just 30 miles (48km) from the capital, La Paz, but the expedition also rediscovered the devil-eyed frog, seen just once before, and a satyr butterfly not seen for nearly a century. Alongside these were threatened species including the spectacled bear and the channel-billed toucan. …The scientists spent two weeks hiking up and down the 2,000-metre slopes and, while expecting to find some new insects, were surprised by what they encountered. …The expedition was part of Conservation International’s Rapid Assessment Program, which Trond describes as an “ecological Swat team” that responds when information on a poorly known area is urgently needed.