Sulphur-crested Cockatoo (Greater Sulphur-crested Cockatoo)
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Psittaciformes, Family: Cacatuidae, Genus: Cacatua, Species: Cacatua galerita · Cacatuidae (Cockatoos) · Flight feather (secondary or inner primary)
Species
Cacatua galerita (Confidence Level: 95%)
Feather Type
Flight feather (secondary or inner primary)
Family
Cacatuidae (Cockatoos)
Shape
Asymmetrical vane typical of flight feathers; the leading edge is narrower than the trailing edge; rounded tip with a slight taper toward the base.
Size
Approximately 18-22 cm (7-8.5 inches) long, consistent with the mid-sized flight feathers of a large cockatoo.
Rarity
Very Common within its native range; often found in large, noisy flocks.
Color & Pattern
Predominantly brilliant white on both dorsal and ventral surfaces; subtle pale yellow (sulphur) wash is visible on the ventral/inner vane, especially toward the base, which is characteristic of this species.
Barb Structure
Pennaceous throughout most of the vane for structural rigidity; tightly interlocked barbs; small amount of plumulaceous (downy) structure at the very base near the calamus.
Texture & Surface
Smooth, stiff, and somewhat waxy to the touch; the surface has a fine 'powder down' coating giving it a matte finish; the leading edge is very rigid to withstand flight pressure.
Description
A large, iconic white parrot with a distinctive forward-curving yellow crest. This feather reflects the bird's robust nature; the species is known for its high intelligence, loud screeching calls, and playful, sometimes destructive behavior. Adult birds have a wingspan of about 100cm.
Key Features
Large size, pure white color with a hidden pale yellow wash on the underside, and a thick, sturdy white rachis.
Habitat
Woodlands, rainforest margins, scrublands, and increasingly common in urban parks and suburban gardens.
Geographic Range
Native to Australia, New Guinea, and some islands in Indonesia; introduced and established in parts of New Zealand and Singapore.
Condition Notes
Good condition; the vane is largely intact with minor separation near the base; the calamus (quill) is clean, suggesting a natural molt rather than a forced removal.
Interesting Facts
Sulphur-crested Cockatoos can live up to 70-80 years in captivity and are known to be 'left-footed,' almost always using their left foot to hold food.
Ecological Role
Predominantly a seed and nut eater, they act as seed dispersers but can also be 'ecosystem engineers' by breaking off dead wood in search of grubs; they are a high-level prey species for large raptors.
Similar Species
Little Corella (smaller, lacks yellow wash), Major Mitchell's Cockatoo (pink tones), and Umbrella Cockatoo (different range and broader feather shape).