The cited English language Wikipedia article on the harpy eagle (Harpia harpyja) gives no total population number or range anywhere in its text; a full-article search this pass found only regional decline and extirpation patterns, no comprehensive count.
What would resolve this A dedicated IUCN Red List population assessment, or a peer reviewed range wide survey, stating a number of mature individuals or total adults for the species as a whole.
Openconservation biologyHarpy Eagle (Wikipedia)