Collopy, M.W. (1977). “Food Caching by Female American Kestrels in Winter”. Condor79 (1): 63–68. doi:10.2307/1367531. JSTOR1367531.
Griffiths, C. S.; Barrowclough, G. F.; et al. (2004), “Phylogeny of the Falconidae (Aves): a comparison of the efficacy of morphological, mitochondrial, and nuclear data”, J. Avian Biol.31 (1): 101–109, doi:10.1016/j.ympev.2003.11.019
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 Evolution82: 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 Evolution82: 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”. Condor79 (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 Evolution82: 166–182. Bibcode: 2015MolPE..82..166F. doi:10.1016/j.ympev.2014.08.010. PMID25256056.
Griffiths, C. S.; Barrowclough, G. F.; et al. (2004), “Phylogeny of the Falconidae (Aves): a comparison of the efficacy of morphological, mitochondrial, and nuclear data”, J. Avian Biol.31 (1): 101–109, doi:10.1016/j.ympev.2003.11.019