Crested Serpent-Eagle (Spilornis cheela) lives in tropical rainforest across Tropical Asia. It feeds on small mammals birds. Its conservation status is Least Concern.
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Crested serpent eagles can be as small as a backyard chicken or as hefty as a small dog, depending on their island home. Total length ranges from 41 cm to 75 cm and wingspan from 89 cm to 169 cm, while body mass can swing three-fold between races. The tiniest race, S. c. minimus, weighs about 420 g in males and 565 g in females, whereas the large S. c. hoya race averages 1,207 g and can top 1,800 g, with some individuals reaching roughly 2,300 g. This extreme size spread shows how isolation on islands drives rapid physical change, a classic case of insular dwarfism and gigantism shaping predators.
Crested serpent eagles lay a single egg that hatches after roughly 41 days, and the chick takes about two months to fledge. The female does all the incubating while the male stands guard. Because the pair usually raises only one chick per season, any loss of an egg triggers a replacement clutch 2-7 weeks later, underscoring how tightly timed their reproductive calendar is and why protecting nests is vital for population stability.
When a local trader tried to sell a crested serpent eagle on Java's Mount Slamet, villagers intervened, threatened him with police, and forced him to surrender the bird. Indonesian law makes trafficking protected species punishable by up to five years in prison and a fine of 100 million rupiah (≈ $7,300). The community's swift action not only saved the eagle but also reinforced the power of grassroots enforcement in protecting wildlife.
In southern Taiwan, radio-tracking showed males roamed an average of 16.7 km² while females used about 7 km².
The Bawean serpent eagle may be on the brink of disappearance, with only 26-37 breeding pairs left. Such a minuscule population size classifies it as critically endangered.
Sources
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As the misty dawn breaks over the forest canopy, the Crested Serpent-Eagle stirs, its piercing gaze scanning the underbrush for the slightest whisper of movement, its broad wings beating powerfully as it takes to the skies. With a fluid, effortless motion, it soars through the trees, its sharp talons extended like nature's own precision instruments, ever vigilant for the snakes and lizards that make up its prized prey. In this realm of ancient, sun-dappled forests, the Crested Serpent-Eagle reigns supreme, a master of stealth and cunning, its very presence a testament to the enduring beauty and wonder of the natural world.
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