Accipiter efficax Balouet & Olson, 1989:6

Powerful goshawk



Taxonomy & Nomenclature

Anderson et. al. (2010) hesitated at accepting the distinctiveness of this taxon based upon the fact that (Balouet & Olson, 1989) did not perform adequate comparisons with other taxa, only using a small sample size when establishing Accipiter efficax:

"Balouet & Olson (1989) described two Accipiter species (Accipiter quartus and A. efficax) on the basis of fossils that were slightly larger than the extant A. haplochrous and A. fasciatus, respectively. Given the intraspecific variability in extant raptor size and taking into account that only a few fasciatus (none from New Caledonia) and few haplochrous specimens were examined, then these determinations are suspect"

(Anderson et. al. 2010; 101)


Conservation Status




New Caledonia


Biology & Ecology




Holotype: NCP 1100

Type locality: "Pindai Cave, Nepoui Peninsula, west coast of New Caledonia; 21°20'S, 164°57'E."



NCP 1101

NCP 1102

NCP 1103

NCP 1104

NCP 1105

NCP 1106

NCP 1107

NCP 1108

NCP 1109

NCP 1110

NCP 1111

NCP 1112

NCP 1113

NCP 1114

NCP 1115

NCP 1116

NCP 1117

NCP 1118






Original scientific description:

Balouet, Jean Christophe and Olson, Storrs L. (1989). Fossil Birds from Late Quaternary Deposits in New Caledonia. Smithsonian Contributions to Zoology 469: 1-38, 16 figures, 13 tables.


Other references:

Anderson, Atholl, Sand, Christophe, Petchey, Fiona and Worthy, Trevor H. (2010). Faunal Extinction and Human Habitation in New Caledonia: Initial Results and Implications of New Research at the Pindai Caves. Journal of Pacific Archaeology 1(1): 89-109.

Hume, Julian Pender and Walters, Michael. (2012). Extinct Birds. London: T & AD Poyser.


<< Back to the Accipitriformes (Eagles, Hawks, Kites, Secretarybirds, Ospreys, Old World Vultures etc.) database