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| | Number of Subspecies: | 11 (?) | | Information Source for Taxonomy: | del Hoyo & Collar (2014) Illustrated Checklist of the Birds ot the World, Vol. 1, Non-passerines
| | Head-Torso-Length: | 51 - 65 cm | | Wingspan: | 110 - 130 cm | | Weight: | 0,600 - 1,200 kg | | IUCN status: | LC (Least Concern)
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