rufous turtle dove records took place in 1994, and concluded that three of the eight accepted records should no longer stand. A review of lesser kestrel records, begun in 1994, and completed in 1995, concluded that six accepted records of this species should no longer be regarded as acceptable. Five of the six were from autumn, whereas the overwhelming majority of records the committee continued to accept are from the spring/summer period. All 24 spring records of Siberian stonechat were reconsidered in 2002–04, in the light of new information on the variability in appearance of European stonechats in spring; the committee decided that all but five should remain accepted. In 2003, the committee revised its assessment criteria for male pine buntings, redefining some birds previously considered hybrids as acceptable, but requiring an overall greater level of precision in descriptions, and reviewed past records in the light of these changes. As of 2017, the following reviews are underway: a review of past records of Macaronesian shearwaters, reviews of all claimed Nearctic cackling goose records, a review of great white egrets to establish if any are of the Nearctic race, a review of sandplovers, a review of records of the eastern race of common redstart, a review of Orphean warbler records aimed at determining the race of each, and a review of subalpine warblers to determine which individuals are ascribable to the race albistriata. It has also been suggested that reviews should be conducted of records of great snipe, as older records show a very different temporal occurrence pattern than more recent birds, the large numbers of gull-billed tern records from the English south coast from the 1960s, and desert wheatears, to establish racial identifications. Problematic records Most records received by the committee are processed within a year and published in its annual report in British Birds. Some records prove problematic, and for some species, it has taken the committee many years to come to a decision. This has particularly been the case where the species or subspecies in question was new to Britain—examples include northern harrier (Britain's first, in Scilly in 1982, accepted in 2007), long-toed stint (Britain's first, in Cornwall in 1970, accepted in 1994), least tern (Britain's first, and to date only record, accepted in 2005, after first occurring in 1983), black lark (Britain's first, from Spurn, Yorkshire in 1984, accepted in 2004 after a second set of notes