1904

• Hellmayr, C.E. 1904. Exhibited the types of five South American birds, which he described as follows: Bulletin of the British Ornithologists' Club 14: 51–55. London. BHL Reference page. 

1905–1906

• Hellmayr, C.E. 1905. Described a new species of Tyrant from Brazil. Bulletin of the British Ornithologists' Club 15: 73–74. London. BHL Reference page. 

• Hellmayr, C.E. 1905. Descriptions of two new Birds discovered by Mr. O.T. Baron in Northern Peru. Novitates zoologicae 12(2): 503–504. BHL DOI: 10.5962/bhl.part.24277 Reference page. 

• Hellmayr, C.E. 1905–1906. Revision der Spix'schen typen brasilianischen Vögel. Abhandlungen der Mathematisch-Physikalischen Klasse der Königlich Bayerischen Akademie der Wissenschaften. K12 22: 561−726. München. BHL Reference page. 

1906

• Hellmayr, C.E. 1906. Exhibited and described the new following neotropical birds. Bulletin of the British Ornithologists' Club 16: 82–86. London. BHL Reference page. 

1907

• Hellmayr, C.E. 1907. Exhibited and described the following new birds from Brazil. Bulletin of the British Ornithologists' Club 19: 51–55. Witherby and Co. London. BHL Reference page. 

1910

• Hellmayr, C.E. 1910. The birds of the Rio Madeira. Novitates Zoologicae 17: 370. Reference page. 

1911

• Hellmayr, C.E. 1911. Description d'une nouvelle espéce du genre Siptornis. Revue Française d'Ornithologie: Scientifique et Pratique 2(21): 1–2. BHL. Reference page. 

1925

• Cory, C.B. & Hellmayr, C.E. 1925. Catalogue of birds of the Americas and the adjacent islands, Part IV, Furnariidae - Dendrocolaptidae. Field Museum of Natural History, Publication 234, Zoological Series. 13: 1–390. BHL Reference page. 

1927

• Cory, C.B. & Hellmayr, C.E. 1927. Catalogue of birds of the Americas and the adjacent islands, Part V, Tyrannidae. Field Museum of Natural History, Publication 242, Zoological Series. 13: 1–517. BHL Reference page. 

1929

• Hellmayr, C.E. 1929. A contribution to the ornithology of northeastern Brazil. Field Museum of Natural History, Publication 255, Zoological Series, Vol. 12, no. 18: 233–501. Chicago. BHL Reference page. 

1932

• Hellmayr, C.E. 1932. The Birds of Chile. Field Museum of Natural History, Publication 308, Zoological Series, Vol. 19: 1–472. Chicago. BHL Reference page.