the.com/goldfinch
a thistle-cracking acrobat that paints itself yellow only when it's time to impress
color shiftMales molt drab in winter, blaze gold for summer
strict dietAlmost entirely seeds, even feeding chicks plant matter
late nesterBreeds in summer to match thistle seed season
upside downFeeds dangling acrobatically from seedheads
flight songBounces through air calling 'po-ta-to-chip'