I had some ideas for DIYs with feathers:
– you could paint the tips metallic for a minimalist look
– if the feathers are white you could dip dye them with a diluted dye and do an ombre look
– you could take a detail paint brush and do small/intricate designs on them
Any of these can be made into:
– earrings by taking a dangly earring base and gluing the feathers to it
– wall decor by gluing the feathers onto twine or some type of string and tying many strings of different lengths onto a branch/stick
