Sulphur-crested Cockatoo (also known as the Greater Sulphur-crested Cockatoo)
Kingdom: Animalia; Phylum: Chordata; Class: Aves; Order: Psittaciformes; Family: Cacatuidae; Genus: Cacatua; Species: Cacatua galerita
Family: Cacatuidae (Cockatoos)
- Shape
- Highly asymmetrical with a very narrow leading edge (outer vane) and a broad trailing edge (inner vane). The tip is rounded, and the overall shape is elongated and slightly curved, characteristic of a bird built for strong, flapping flight.
- Size
- Approximately 25-30 cm (10-12 inches) in length based on the scale of the furniture/shoes. This aligns perfectly with the primary flight feathers of a large adult Cockatoo.
- Rarity
- Very Common within its native range (often considered a pest in parts of Australia); Rare to non-existent in the wild outside of its native or introduced oceanic range.
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Description
This feather belongs to the iconic Sulphur-crested Cockatoo, a large, loud, and highly intelligent parrot. The bird is entirely white except for a spectacular forward-curving yellow crest and yellow wash under the wings and tail. They have a massive black bill for cracking nuts and a wingspan of up to 100 cm.
Colour & Pattern
Pure snow-white across the entire dorsal and ventral surfaces. The rachis is also white to ivory. There is no evidence of yellow washing on this specific feather, which common on the underside of retrices or underwing coverts in this species, suggesting this is a dorsal primary.
Barb Structure
Densely pennaceous throughout most of the vane, providing a rigid surface for flight. The barbs are tightly interlocked with microscopic hooklets. A small amount of plumulaceous (downy) structure is visible at the very base of the calamus.
Texture & Surface
Smooth and somewhat waxy to the touch, with a characteristic matte or 'powdery' finish. This is due to 'powder down,' which cockatoos produce to waterproof and protect their feathers.
Key Features
Extreme asymmetry characteristic of large parrot primaries; pure white coloration with no banding; thick white rachis; and a distinct 'powder down' matte texture.
Habitat
Wooded habitats, rainforest edges, savannas, and increasingly common in suburban and urban parklands where large trees are available for roosting.
Geographic Range
Native to Australia (north and east), New Guinea, and the Aru Islands. It has been introduced to New Zealand, Indonesia, and Singapore.
Ecological Role
High-level consumer of seeds and nuts; they act as important seed dispersers but can also be destructive to trees and crops when congregate in large flocks. Their conservation status is Least Concern (IUCN).
Similar Species
Little Corella (smaller, different wing shape), Major Mitchell's Cockatoo (would show pink/salmon at the base), and Galah (would show grey and pink).
Interesting Facts
Sulphur-crested Cockatoos can live for over 80 years in captivity. They are 'left-footed' more often than 'right-footed' when handling food, and they are known to use tools and solve complex puzzles.
Condition Notes
Fair to Good. The feather shows significant 'zipper' separation (emargination) along the trailing edge, likely from natural wear or stress during the molt. The calamus appears intact but slightly soiled at the tip.