Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis Author Linnaeus, Carolus text 1758 Laurentius Salvius Stockholm https://archive.org/download/mobot31753000798865/mobot31753000798865.pdf book 2C6327E1-5560-4DB4-B9CA-76A0FA03D975 https://doi.org/10.5962/bhl.title.542 3922206 Picus tridactylus [ spec. nov. ] P. albo nigroque varius, pedibus tridactylis. Fn. svec. 84. Act. Stockh. 1740. p. 222. Picus tridactylus. Edw. av. 114. t. 114. Picus tridactylos anomalus. Mus. petrop. 368. Habitat in Svecia ad Alpes Lapponicas, Dalekarlicas frequens & ad sinum Hudsonis nec non in Sibiria. Europaeus vertice flavo, Americanus rubro est. Ani regio albida.