Jackdaw (sometimes called Eurasian Jackdaw or Western Jackdaw)
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Passeriformes, Family: Corvidae, Genus: Coloeus, Species: Coloeus monedula · Corvidae (Crows, Jays, and Magpies) · Contour (Body feather)
Species
Coloeus monedula (highly likely based on size and coloration for Cornwall location)
Feather Type
Contour (Body feather)
Family
Corvidae (Crows, Jays, and Magpies)
Shape
Symmetrical, rounded tip with a broad, ovate outline. The feather is semi-flexible and lacks the rigid asymmetry of a flight feather.
Size
Approximately 4-6 cm in length. This is consistent with the standard size for a nape or upper mantle contour feather of a Jackdaw.
Rarity
Very Common; one of the most frequently seen corvids in urban and coastal UK environments.
Color & Pattern
Gradient from a light brownish-grey downy base to a dark charcoal or slate grey tip. In Cornwall Jackdaws, the nape can appear quite pale grey, contrasting with a black cap.
Barb Structure
The distal (top) half is pennaceous (interlocked), while the proximal (bottom) half is plumulaceous (downy and fluffy) for insulation.
Texture & Surface
Silky and soft. The upper portion has a slight matte sheen, while the lower portion is very soft to the touch for heat retention.
Description
A small, dapper crow with a black cap and distinctive silvery-grey nape. Jackdaws have striking pale white irises and are highly social, often seen in pairs or large, noisy flocks.
Key Features
Soft grey gradient coloration and the small size relative to other crows. The fluffy base is very prominent compared to the sleek distal end.
Habitat
Open woodland, coastal cliffs (common in Cornwall), parks, gardens, and old ruins or chimneys for nesting.
Geographic Range
Found across Europe, western Asia, and North Africa. In the UK, they are year-round residents and especially abundant in the South West.
Condition Notes
Good condition; likely a naturally molted feather. No signs of parasites or 'stress bars' (unpigmented lines) are visible.
Interesting Facts
Jackdaws are highly intelligent and form lifelong pair bonds. They are famous for 'anting'—rubbing ants on their feathers to use formic acid as a natural pesticide.
Ecological Role
Omnivorous scavenger and insectivore. They play a role in pest control and as a prey species for larger raptors like Peregrine Falcons.
Similar Species
Carrion Crow (feathers are much larger and solid black), Rook (feathers are larger with a purple/oil sheen), or Wood Pigeon (feathers have a different texture and often a white band).
Notes
Cornwall