The species requiring extra protection in the Netherlands are: red-throated divers, black-throated divers, cormorants, great and little bitterns, purple herons, spoonbills, tundra swans, whooper swans, barnacle geese, smews, honey buzzards, red kites, white-tailed eagles, marsh harriers, hen harriers, Montagu's harriers, Peregrine falcons, black grouses, spotted crakes, corn crakes, cranes, black-winged stelts, avocets, golden plovers, bar-tailed godwits, Mediterranean gulls, gull-billed terns, Caspian terns, sandwich terns, common terns, Arctic terns, little terns, black terns, short-eared owls, European night jars, black woodpeckers, wood larks, bluethroats and red-backed shrike. In 2008, the common kingfisher was removed from the red list of threatened species, thanks to its recovery of more than 650 pairs within 10 years.