White-bellied Sea-Eagle

This feather belongs to the White-bellied Sea-Eagle, a magnificent raptor with a white head and underparts and contrasting dark gray wings. In flight, they are easily recognized by their massive 'V' shaped soaring profile (dihedral) and their barking, goose-like vocalizations.

Uniform slaty-gray to brownish-gray on the upper surface of the vane, fading to a lighter grayish-white near the base; the ventral surface is paler. No banding or spots, which is characteristic of adult plumage.

Tightly interlocked and pennaceous for most of the length to provide aerodynamic lift; plumulaceous (fluffy) at the very base for insulation near the skin.

The rachis is exceptionally thick, rigid, and creamy-white to yellowish in color. Barbs are densely packed and angled steeply toward the tip to maintain a smooth aerodynamic surface.

Stiff and slightly coarse to the touch. The surface has a matte to low-gloss finish and is designed to withstand high wind pressure during coastal soaring.

Outer wing (Primary). The extreme asymmetry and stiffness are diagnostic of a primary feather used for powerful flight and soaring.

Large size, extreme asymmetry, thick white rachis, and uniform gray coloration without the banding seen in Ospreys or smaller hawks.

Coastal waters, estuaries, large rivers, and inland lakes. Often found nesting in tall trees or on rocky cliffs overlooking the water.

Found along coastal Australia (including NSW), Southeast Asia, and India. They are generally resident (non-migratory) throughout their range.

Apex predator and scavenger; they play a vital role in the ecosystem by preying on sea snakes, fish, and waterbirds, as well as cleaning up carrion along the shore.

Wedge-tailed Eagle feathers are larger and darker (nearly black); Osprey feathers are smaller and usually feature distinct dark banding or mottling.

The White-bellied Sea-Eagle is the second largest raptor in Australia. They are known for their spectacular courtship displays where pairs lock talons and cartwheel through the air.

Significant to many Indigenous Australian groups, often appearing in Dreamtime stories and as a totem for coastal clans. In modern times, eagle feathers are strictly protected and highly respected in avian research.

Look for these feathers beneath large stick nests in coastal eucalyptus trees or on beaches after high winds. The thick, white quill (calamus) is a major giveaway for sea-eagles.

The feather appears to be a naturally molted specimen. There is some minor fraying on the trailing edge and the tip (common in older feathers), but the rachis remains structurally sound. No significant fault bars are visible.

Found on a beach on the south coast of NSW Australia