This article was published in February 2016 in the Ornis Fennica journal.
It deals with Mallards that have been bred in captivity, and then released in the Camargue (Southern France) for game.
You can access it in open access as well as its abstract on the publisher’s website through the opposite link.
Photo : “Mallard duck 03-05-2010” by Letartean – Own work. Licensed under CC BY 3.0 via Wikimedia Commons – https://commons.wikimedia.org/wiki/File:Mallard_duck_03-05-2010.jpg#/med…