A review of American and Pacific golden plover records was begun in 1991, with the purpose of evaluating whether any individuals previously accepted as "either American or Pacific" could now be definitely assigned to one species or the other (and vice versa). The results (a small decrease in the number of accepted American golden plovers, and a small increase in the number of accepted Pacifics) were published in the committee's report for 1996, with a comment that a detailed paper on the subject was being prepared, although as of 2009, this has not been published. A review of isabelline shrike records commenced in 1986. This review, the results of which were published in 1989, established a racial identification for a number of adult isabelline shrikes previously accepted to species level. A further review, with the same aim, was begun in the late 1990s. A preliminary set of results of this review was published in 2003; four previously accepted individuals were rejected, including one, in Cambridgeshire in 1978, which is now thought have been a hybrid with red-backed shrike. The full results of this second review were published in 2007; some of the previous racial attributions were withdrawn, but the committee felt able to confidently assign a race for a number of more recent individuals, although it stressed that this could only be done with adult birds (the committee's 2005 report mentions that a further article is in preparation). A review of black-eared wheatears was conducted in 2002–04, with the aim of assigning individuals to the eastern and western races where possible; this was possible with nine records; both western "hispanica" and eastern "melanoleuca" were shown to have occurred.