Three species thought extinct, including a caddisfly and yellow-spotted bell frog, have been sighted in the UK and AustraliaThree species thought to be extinct have been found again, to the delight of conservationists.In the UK, the rare ghost orchid, declared extinct in this country just last year, has been found in England, and a caddisfly – a small flying insect – last seen more than a century ago has been discovered again in Scotland. On the global stage the yellow-spotted bell frog, presumed "possibly extinct" by the International Union for the Conservation of Nature, has been seen on a creek-bed in Australia.The good news stories follow a warning by a leading IUCN expert that humans are now driving plants and ...