since the committee's formation. The first was soon after the committee's formation, in 1963, when 16 species were removed: red-crested pochard, snow goose, pectoral sandpiper, Mediterranean gull, Sabine's gull, melodious warbler, icterine warbler, yellow-browed warbler, northern goshawk, golden eagle, red kite, Kentish plover, crested tit, bearded tit, marsh warbler and Dartford warbler. Records of the last eight species had been considered only outside their "normal" British range (e.g. crested tits outside Scotland, and red kites outside Wales). Kentish Plover was readmitted in 2020 following the loss of breeding populations in both the UK and nearby continental Europe leading to a massive decline in records. The second was in 1982, when ten further species were removed: Cory's shearwater, purple heron, white stork, buff-breasted sandpiper, Richard's pipit, tawny pipit, Savi's warbler, aquatic warbler, serin and common rosefinch. Savi's warbler was re-admitted to the committee's list in 1998, due to declining numbers of occurrences, with Tawny Pipit and Aquatic Warbler being reinstated in 2015. Thirdly, in 2006, a further 17 species were dropped from the list: ferruginous duck, Wilson’s petrel, great white egret, black kite, red-footed falcon, American golden plover, white-rumped sandpiper, white-winged black tern, alpine swift, red-rumped swallow, red-throated pipit, subalpine warbler, greenish warbler, dusky warbler, Radde's warbler, Arctic redpoll and rustic bunting. Their selection was based on different criteria from those previously used: more than 200 records in Britain ever, and more than 100 occasions in the last decade. Of the 17 species that were removed in the 2006 purge, three have been reinstated - Ferruginous Duck in 2017, and Red-throated Pipit and Rustic Bunting in 2015. Many other species and subspecies have been removed over the years: Cetti's warbler (in 1976); long-tailed skua (in 1979); common crane and ring-billed gull (in 1987); surf scoter, little egret, European bee-eater, Pallas's warbler and woodchat shrike (in 1990); green-winged teal (in 1992); ring-necked duck, greater short-toed lark and little bunting (in 1993); white-tailed eagle and Kumlien's gull (in 1998); American wigeon, black-crowned night heron and rose-coloured starling (in 2001); and black brant (in 2005). Until 2009, the parrot crossbill was an anomaly, in that it was on the committee's list of species, even though a breeding population existed in Scotland. In 2009, this species was removed, along with white-billed diver and cattle egret. Latter removals included Glossy Ibis and Olive-backed Pipit in 2013, Lesser Scaup, Citrine Wagtail and Blyth's Reed Warbler in 2015