Trends in geographic variation of cooper's hawk and northern goshawk in north america: a multivariate analysis. Proceedings of the Western Foundation of Vertebrate Zoology, Vol. 5, No. 3. By Wayne H. Whaley and Clayton M. White. Western Foundation of Vertebrate Zoology, Camarillo, California. 1994:161-209 pp., 22 numbered maps and figs., 10 numbered tables. $8.00 (paper).-Subspecies are no longer "popular" in North American ornithology, and studies of geographic variation in avian anatomy are not as common as they once were. Indeed, the most recent previous accounting of geographical variation in North American accipiters was published almost a quarter of a century ago (Wattel, J. Geographical differentiation in the genus Accipiter. Nuttall Ornithological Club, Cambridge, Massachusetts, 1973). Whaley and White's substantial and significant contribution helps right this unfortunate wrong.
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机译：北美库珀鹰和北苍鹰地理变异的趋势：多变量分析。西方脊椎动物学基础学报，第一卷。 ，第5期，第3期。由Wayne H. Whaley和Clayton M. White撰写。加州卡马里洛的脊椎动物生态学西部基金会。 1994：161-209页，有22个编号的地图和无花果，有10个编号的表格。 8.00美元（纸质）。-亚种在北美鸟类学中不再受欢迎，对鸟类解剖学地理变异的研究也不再像以前那样普遍。的确，在过去的四分之一世纪以前，有关北美接收者地理变化的最新统计数据已经出版（Wattel，J. Accipiter属的地理差异。NuttallOrnithological Club，剑桥，马萨诸塞州，1973年）。沃利和怀特的巨大和重大贡献有助于纠正这一不幸的错误。
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