Guillermo Rodríguez
Table 1. Identification key to the separation of Spanish Imperial Aquila adalberti and Eastern Imperial Eagles A. heliaca.
Juvenile | - Plain underwing in adalberti. - Advanced moult in adalberti, with several inner primaries moulted by late spring/early summer. - Upperparts variably patterned but white spots, if present, are larger and less contras |
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