On some birds the contour feathers have what’s called an afterfeather, a little fluffy plume from the same follicle as the big feather. This provides extra insulation and is especially common in grouse.
https://vermontalmanac.org/wp-content/uploads/VTALMANAC_LOGO_STACK_TAG-300x150.png00Dave Mance IIIhttps://vermontalmanac.org/wp-content/uploads/VTALMANAC_LOGO_STACK_TAG-300x150.pngDave Mance III2020-12-08 13:26:252020-12-08 13:26:25On some birds the contour feathers have what’s called an afterfeather, a little fluffy plume from the same follicle as the big feather. This provides extra insulation and is especially common in grouse.