" 'It is a remarkable come-back for an animal once threatened with extinction,' exclaimed a television reporter as a beaming biologist emptied a binful of Field Crickets into the grass. Some 4,000 of the chirping creatures have been reared by London Zoo, all squeezed out of just three heroic pairs of wild caught crickets. I hope the english climate did not come as a nasty shock to them. It has been very cold and wet lately."