Crested Hawk-Eagle (Nisaetus cirrhatus) lives in tropical forests across Southeast Asia. It feeds on small mammals birds. Its conservation status is Least Concern.
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The changeable hawk-eagle possesses a unique covering of specialised feathers on its tarsus, a trait shared only with other members of the subfamily Aquilinae. These signature feathers are completely absent in tropical raptors that belong to any other subfamily, making them a reliable diagnostic feature for field identification. Their presence highlights the distinct evolutionary lineage of this group within the broader Accipitridae family.
The nominate subspecies of the changeable hawk-eagle displays the longest crest of the entire species, measuring between 10 and 14 cm, which is why it is often called the crested hawk-eagle. This relatively long plume contrasts with the much shorter or even vestigial crests found in other subspecies, where some individuals have crests as short as 1 cm or lack them entirely.
In the changeable hawk-eagle the rear hallux-claw serves as the primary killing tool, with females averaging 37.9 mm in length and males slightly shorter at 32.3 mm. These measurements were recorded from a small sample of six females and seven males, underscoring the sexual dimorphism that also appears in overall body size. The longer claw in females enhances their ability to grasp and dispatch prey, complementing the species' reputation as an agile forest predator.
Within its genus, the changeable hawk-eagle is the most widely distributed, adaptable and abundant species. Its range stretches from the Indian subcontinent, through the Himalayan foothills of Nepal and northeast India, across Burma and the Malay Peninsula, and continues eastward to the Philippines and the Greater Sunda Islands. This extensive forest habitat includes both mainland and numerous islands, allowing the bird to occupy a variety of wooded environments.
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In the dappled light of the forest canopy, the Crested Hawk-Eagle soars with effortless precision, its broad wings beating in a slow, powerful rhythm as it scans the treetops for the telltale flutter of its next meal. With its sharp, hooked beak and piercing gaze, this majestic hunter is a master of stealth and strategy, capable of plucking unsuspecting prey from the very branches themselves. As it rides the thermal currents, its crest lifted high, the Crested Hawk-Eagle embodies the wild, unbridled spirit of the tropical wilderness.
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