I've never seen one in the Netherlands. The last documented observations is from juli 2015. They are seen in the Netherlands rarely and mainly in the North.
In the Spanish Pyrenees and Andalusia I did see this smallest of all eagles.
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Spanish pyrenees
Remarks: Booted Eagle in the Spanish Pyrenees
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Spanish pyrenees
Remarks: Booted Eagle in the Spanish Pyrenees
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Spanish pyrenees
Remarks: Light phase
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Spanish pyrenees
Remarks: Light phase
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Booted Eagle in the Spanish Sierra Nevada, Andalusia
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Booted Eagle in the Spanish Sierra Nevada, Andalusia
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: The size of a Common buzzard
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: The size of a Common buzzard
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Family: Accipitridae
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Genus: Hieraaetus
Species: Hieraaetus pennatus
Dutch name: Dwergarend
Common name: Booted eaglle
Location: Andalusia, Spain
Remarks: Dark phase
Field characteristics
Sound:
The sound is a high, melodious squeeking.