Leach, William Elford (1819). "Eleventh Room". Synopsis of the Contents of the British Museum (15th ed.). London: British Museum. pp. 63–68 [63]. The name of the author is not specified in the document, Leach was the Keeper of Zoology at the time.
Collopy, M.W. (1977). "Food Caching by Female American Kestrels in Winter". Condor. 79 (1): 63–68. doi:10.2307/1367531. JSTOR1367531.
Fuchs, J.; Johnson, J.A.; Mindell, D.P. (2015). "Rapid diversification of falcons (Aves: Falconidae) due to expansion of open habitats in the Late Miocene". Molecular Phylogenetics and Evolution. 82: 166–182. Bibcode:2015MolPE..82..166F. doi:10.1016/j.ympev.2014.08.010. PMID25256056.
Fuchs, J.; Johnson, J.A.; Mindell, D.P. (2015). "Rapid diversification of falcons (Aves: Falconidae) due to expansion of open habitats in the Late Miocene". Molecular Phylogenetics and Evolution. 82: 166–182. Bibcode:2015MolPE..82..166F. doi:10.1016/j.ympev.2014.08.010. PMID25256056.
jstor.org
Collopy, M.W. (1977). "Food Caching by Female American Kestrels in Winter". Condor. 79 (1): 63–68. doi:10.2307/1367531. JSTOR1367531.
Fuchs, J.; Johnson, J.A.; Mindell, D.P. (2015). "Rapid diversification of falcons (Aves: Falconidae) due to expansion of open habitats in the Late Miocene". Molecular Phylogenetics and Evolution. 82: 166–182. Bibcode:2015MolPE..82..166F. doi:10.1016/j.ympev.2014.08.010. PMID25256056.
PVPH 465: a phalanx 1 of the middle toe. A caracara? Possibly belongs in extant genus. Kramarz, Alejandro: Garrido, Alberto; Forasiepi, Analía; Bond, Mariano & Tambussi, Claudia (2005): Estratigrafía y vertebrados (Aves y Mammalia) de la Formación Cerro Bandera, Mioceno Temprano de la Provincia del Neuquén, Argentina. Revista Geológica de Chile32(2): 273–291. HTML fulltext
Myers, P. R.; C. S. Parr; T. Jones; G. S. Hammond; T. A. Dewey. "Subfamily Falconinae (falcons)". Animal Diversity Web. University of Michigan. Retrieved 2009-08-17.