E Vicipaedia
Sialia arctica. Arctic Bluebird. (Modern nomenclature, Sialia currucoides, Mountain Bluebird) From: Reports of Explorations and Surveys.... Volume X. 1859 of the U. S. Pacific railroad Explorations and Surveys 38th, 39th, 41st Parallels.
Nexus ad imaginem
Paginae insequentes huic imagini nectunt: