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@featherfriendly
An amazing independent study done on Feather Friendly® from PeerJ. Full article can be found here: peerj.com/articles/13142 thepeerj #birdfriendly #windowmarkers #glasscollision #featherfriendly #research

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    • birdfriendly
    • research
    • glasscollision
    • featherfriendly
    • windowmarkers