Aquila is the genus of true eagles. It is often united with the buteos, sea eagles and other more heaviset Accipitridae, but more recently it appears as if they are less distinct from the more slender accipitrine hawks than believed. Eagles are not a natural group but denote essentially any bird of prey large enough to hunt sizeable (about 50 cm long or more overall) vertebrate prey.
belongs to an extremely close-knit group of "typical" eagles. These include genera like Hieraaetus
and the extinct Harpagornis
, and all these appear to be paraphyletic
with regards to the traditional Aquila
. Especially some, if not all, species of Hieraaetus
, separated primarily due to their smaller size, seem to belong here. The entire "typical eagle" group is in need of a thorough revision, and thus this species list cannot be more than a tentative one at present.
Most problematic is certainly Hieraeetus, the hawk-eagles. It is known that the type species, the Booted Eagle, is very close to some Aquila eagles. Other hawk-eagles might indeed be distinct enough to warrant generic separation, but the name Hieraaetus is not available for them, being a junior synonym of Aquila as the Booted Eagle is included herein.
- Bonelli's Eagle, Aquila fasciata - formerly Hieraaetus fasciatus
- Booted Eagle, Aquila pennata - formerly Hieraaetus pennatus
- Little Eagle, Aquila morphnoides - formerly Hieraaetus morphnoides
- Rufous-bellied Eagle, Aquila kienerii - formerly Hieraaetus kienerii
- Golden Eagle, Aquila chrysaetos
- Eastern Imperial Eagle, Aquila heliaca
- Spanish Imperial Eagle Aquila adalberti
- Steppe Eagle, Aquila nipalensis
- Tawny Eagle, Aquila rapax
- Greater Spotted Eagle, Aquila clanga - to be moved to Lophaetus or Ictinaetus
- Lesser Spotted Eagle, Aquila pomarina - to be moved to Lophaetus or Ictinaetus
- Indian Spotted Eagle, Aquila hastata - recently split from A. pomarina, to be moved to Lophaetus or Ictinaetus
- Verreaux's Eagle, Aquila verreauxii
- Gurney's Eagle, Aquila gurneyi
- Wahlberg's Eagle, Aquila wahlbergi
- Wedge-tailed Eagle, Aquila audax
- Malagasy Eagle, Aquila sp. (prehistoric)
Numerous fossil taxa
of eagles have been described. Many have been moved to other genera, but several appear correctly assigned to this genus:
It is not clear whether "Hieraaetus" edwardsi (Middle -? Late Miocene of SW Europe) belongs into Aquila or the hawk-eagles (if the latter are indeed distinct). Its initial name, "Aquila" minuta Milne-Edwards, 1871, is preoccupied by a junior synonym of the Booted Eagle, Aquila minuta Brehm, 1831.
Not placed in Aquila anymore are:
"Aquila" danana (Snake Creek Late Miocene/Early Pliocene of Loup Fork, USA), occasionally placed in Geranoaetus or Buteo, was a bird of prey of unclear relationships.
For paleosubspecies of living Aquila, see the species accounts.
- (2002): Cenozoic Birds of the World, Part 1: Europe. Ninox Press, Prague. ISBN 80-901105-3-8 PDF fulltext
- (1964): Catalogue of Fossil Birds: Part 2 (Anseriformes through Galliformes). Bulletin of the Florida State Museum 8(3): 195-335. PDF or JPEG fulltext
- (2000): La fin du Pléistocène supérieur et le début de l'Holocène en Corse: apports paléontologique et archéologique du site de Castiglione (Oletta, Haute-Corse) [The end of the Late Pleistocene and the Early Holocene in Corsica: New paleontological and archaeological data from Castiglione deposit (Oletta, Haute-Corse)]. Quaternaire 11: 219-230. [French with English abstract] HTML abstract