Booted Eagle
Aquila pennata

– buzzard-sized raptor
– diurnal migrant, strictly over land
– migrates singly
– at migration bottlenecks sometimes mixed with other raptors


Booted Eagle Aquila pennata, IMED 2CY
BIF1518, 28/05/2011, Mongolia, Mathias Putze
note contrast between dusky secondaries and lighter inner primaries, tail rather short; aged as 2CY by uniform plumage and worn off translucent light trailing edge


Booted Eagle Aquila pennata, IMED 2CY
BIF1517, 28/05/2011, Mongolia, Mathias Putze
from this angle difficult to rule out -> Black Kite (BIF1303) but note large bill and dark head, barring of secondaries with more contrast


Booted Eagle Aquila pennata, PALE 2CY
BIF1523, 20/04/2011, Maylytogay, Kazakstan, Patrick Franke
light morph, unmistakable! Aged as 2CY due to translucent uniformly `S´-shaped trailing edge of wing


Booted Eagle Aquila pennata, PALE 2CY
BIF1524, 20/04/2011, Maylytogay, Kazakstan, Patrick Franke
same as BIF1523, generally unmarked underside and uniform brown hood are further features for 2CY


Booted Eagle Aquila pennata, DARK AD
BIF1513, 06/06/2016, Mongolia, Mathias Putze
note contrast between dusky secondaries and lighter primaries, tail rather short and not forked -> Black Kite


Booted Eagle Aquila pennata, DARK AD
BIF1514, 06/06/2016, Mongolia, Mathias Putze
same as BIF1513, uniform dark-brown underside and underwing slightly contrasting to paler, cream-colored vent, six long fingers separate it from any Buteo sp. or dark JUV -> European Honey Buzzard


Booted Eagle Aquila pennata, DARK AD
BIF1515, 07/06/2016, Mongolia, Mathias Putze
note different generations of primaries, rectrices with broad subterminal band, increasingly less patterned from central to outermost tail feather


Booted Eagle Aquila pennata, DARK AD
BIF1516, 07/06/2016, Mongolia, Mathias Putze
same as BIF1515, note contrast between secondaries and primaries barely visible when strongly backlit


Booted Eagle Aquila pennata, IMED AD
BIF1519, 13/08/2011, Besh Barmag, Azerbaijan, Michael Heiß
IMED morph can resemble IMM -> Bonelli’s Eagle but note different proportion and missing dark trailing edge, outer primaries are not barred (2nd and 3rd outermost P missing due to regular moult)


Booted Eagle Aquila pennata, IMED AD
BIF1520, 14/08/2011, Besh Barmag, Azerbaijan, Michael Heiß
upperside with light GC band and rump and white `position lights´


Booted Eagle Aquila pennata IMED
BIF1521, 14/06/2011, Mongolia, Mathias Putze


Booted Eagle Aquila pennata, IMED 2CY
BIF1522, 06/06/2016, Mongolia, Mathias Putze
aged as 2CY due to uniformly light trailing edge of wing and tail and pale fringed GC

voice: usually nonvocal during migration

comparison species:
Bonelli’s Eagle (v)
Black Kite (v)
Black-eared Kite (v)
Yellow-billed Kite (v)
European Honey Buzzard (v)
Western Marsh Harrier (v)

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