Feathers from the Eurasian jay are commonly used for wet fly wings or collars, providing unique and effective fly tying material. Blue-dyed Guinea fowl serves as a standard substitute for Eurasian jay feathers, showcasing its own distinct beauty and markings.
The Eurasian jay (Garrulus glandarius), a passerine bird in the crow family Corvidae, is found across a vast region from western Europe to south-east Asia, exhibiting distinct racial forms. Measuring 34–35 cm in length and with a wingspan of 52–58 cm, it resembles a western jackdaw. The nominate race displays rufous brown to pinkish brown plumage, a white throat with black moustache stripes, and a bright blue patch on the upper wing.
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