ID from feather with a yellow spot

Missing feathers with yellow scabs on skin. Wet vent on drake. Swollen foot.

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The Feather Atlas - Feather Identification and Scans - U.S. Fish and Wildlife Service Forensics Laboratory

Abstract Spots Painted with Oil Paint, Feather-like or Boa-like. Red, Yellow, Blue, White, Orange Chaotic Strokes Stock Photo - Image of boalike, grunge: 291593190

Northern Flicker Identification, All About Birds, Cornell Lab of Ornithology

760 Yellow Crowned Images, Stock Photos, 3D objects, & Vectors

How to identify bird feathers - Discover Wildlife

Are You Seeing Tiny Birds with Yellow Spots? — Birdchick

9 Woodpecker In Georgia (with Custom Identification Images)

Feather Identification