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
– contrast between dusky secondaries and lighter inner primaries
– tail rather short
– aged as 2CY by uniform plumage and worn off translucent light trailing edge to the wing


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 to the wing


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


Booted Eagle Aquila pennata, DARK AD
BIF1513, 06/06/2016, Mongolia, Mathias Putze


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
– 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, contrast between secondaries and primaries barely visible against the bright sky


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 to the wing
– outer primaries are not barred (2nd and 3rd outermost primaries missing due to regular moult)


Booted Eagle Aquila pennata, IMED AD
BIF1520, 14/08/2011, Besh Barmag, Azerbaijan, Michael Heiß
– upperwing with pale greater coverts band
– pale uppertail coverts
– white `position lights´ close to necksides


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 to wing and tail and pale fringed greater coverts

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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