I was wondering if anyone has ever used the criterion described by Wolff et al. 1980 for the distinction between black and brown rats femora. It is based on the location of the foramen nutricium in the medial side, next to the crista femoris. Has anyone tested their reliability?

Alternative ways to identify Rattus femora are also welcome.

Best wishes,

Alex

Wolff, P., B. Herzig-Straschil, and K. Bauer. "Rattus rattus (Linné 1758) und Rattus norvegicus (Berkenhout 1769) in Österreich und deren Unterscheidung an Schädel und postcranialem Skelett." Mitteilungen der Abteilung für Zoologie am Landesmuseum Joanneum 9 (1980): 141-188.
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