Sialia currucoides (Bechstein 1798)

The birds of California Los Angeles ;South Moulton Company,1923. biodiversitylibrary.org/page/39772686

Birds Chicago, Ill. :Nature Study Publishing Co.,1897-1898. biodiversitylibrary.org/page/10045792

Birds of the Pacific coast New York,G. P. Putnam's sons,1923. biodiversitylibrary.org/page/7554438

The birds of America :. New York :J.B. Chevalier,1840-1844.. biodiversitylibrary.org/page/40383691

Fauna boreali-americana, or, The zoology of the northern parts of British America :. London :John Murray,1829-1837.. biodiversitylibrary.org/page/41549589