Assertion: harpy eagle | /r/HasProperty | developed in the aid
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Source sentences:
text: In all sea and fish eagles, the toes are relatively short and stout, with the bottom of the foot covered in spicules and the talons being relatively shorter and more strongly curved than in comparably sized eagles of forests and fields, such as the "booted eagle" group (i.e. Aquila) or "harpy eagles", all of these specializations developed in the aid of capturing fish rather than medium-sized mammals and large birds, although clearly these are not excluded from capture.