sentences:  The eastern imperial eagle is typically smaller, being more slender and less bulky and powerful in appearance despite its proportionately larger head and longer neck, than the golden eagle ("Aquila chrysaetos").In some parts of the range, the female imperial eagle probably averages similar size and body mass to the smaller male golden eagle.However, apparently the species can be reliably distinguished by the size of its hallux claw (the enlarged rear talon that accipitrids used as a killing apparatus) which is consistently larger in the golden species.