Crested Serpent Eagle

A medium-large raptor with a distinctive bushy crest. Adults are dark brown with fine white spotting on the underparts and a very striking wide white band across the tail and wings visible in flight.

Signature dark chocolate brown to charcoal base. It features a prominent, broad white subterminal band and smaller white spotting/mottling along the inner vane, a diagnostic trait for this species.

Strongly pennaceous and tightly interlocked for aerodynamic efficiency. The base shows a small amount of plumulaceous (downy) structure near the calamus for insulation.

The rachis is thick, sturdy, and dark brown on the dorsal side, becoming paler/opaque on the ventral side. Barbs are dense and angled sharply to maintain a stiff vane.

Smooth and matte on the dorsal surface with a slight waxy feel for water resistance. The trailing edge is soft but firm, designed for silent and stable flight.

Wing secondary. The broad, relatively straight shaft and moderate asymmetry indicate it sits on the forearm (ulna) of the bird, providing the main lifting surface of the inner wing.

Bold white band across the dark wing feather, broad rounded tip, and white spots on the inner vane near the base.

Primary and secondary tropical and subtropical forests, edge habitats, and sometimes wooded agricultural areas or mangroves.

Widely distributed across South and Southeast Asia, including India, Southern China, Southeast Asia, and specifically common in Taiwan (subspecies S. c. hoya).

Apex predator controlling snake and lizard populations; serves as an indicator species for the health of forest ecosystems.

Mountain Hawk-Eagle (Nisaetus nipalensis) feathers have more numerous, narrower bands; Oriental Honey Buzzard (Pernis ptilorhynchus) has different banding spacing.

This eagle is a specialist ophiphage, meaning it primarily eats snakes. It has thick scales on its legs to protect it from venomous bites.

In many Southeast Asian cultures, it is a symbol of forest health. In indigenous Taiwanese cultures (like the Paiwan), eagle feathers hold high ceremonial and hierarchical status.

Look for these under large forest trees or near perches along forest edges during the post-breeding molt season (late summer/autumn).

Fair to Good. Shows signs of natural wear (weathering) and some splitting of the barbs near the tip, likely a molted feather found on the ground.