Chough — abstract line & facet directions

Rebuilt geometry: harder angles, a shorter wedge bill, and eight irregular facets instead of a fan. No curves anywhere — the eye is a diamond. Structure is carried by gaps and lines, never by colour, so each mark survives flattening to a one-colour alpha mask (last column), which is what Android forces the notification icon to be. Mosaic and strata are gone: both disintegrated below 48px.