Major achievements in 2010 were a successful experimental release of a captive-bred Harpy Eagle into the forest of Darien and progress in analysis of Harpy Eagle nesting data. We extrapolated the nesting density in Darien to the entire area of Panama with suitable habitat at altitudes below 350 m and estimated that the Harpy Eagle population size could be 806-1,208 pairs.
We found that eagles released at 18 months of age or older showed increased survival and shorter dependence periods than eagles released at 5-7 months of age. Hacking proved to be a suitable method for releasing captive-bred Harpy Eagles into the wild, but was more efficient when delayed from fledging age, when falconers traditionally hack falcons, to near the Harpy Eagle’s age of independence at 23 months.
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