“Red and green magnetic fluorescent powders were the most successful at recovering fingerprints from feathers. Black magnetic powder was the most successful at recovering fingermarks from eggs.” (http://www.theguardian.com/environment/2015/jan/14/scientists-recover-fingerprints-bird-feathers-eggs)
Not all you clutch is fair game so beware of being fingered for foul-play.
“The first artificial trees were made in response to the loss of pine forests in Germany. Goose feathers dyed green imitated the green needles.” (http://www.foe.co.uk/green-blog/now-trending-christmas-trees)
This could explain why Scottish Natural Heritage (SNH) plans to cull barnacle geese on Islay (http://www.rspb.org.uk/media/releases/387585-conservation-partnership-urges-minister-to-rethink-risky-goose-cull).
But your goose is as good as mine.