Intersex mallard duck, the movie. Followed from april 2015 til now 2021. Intersex gräsand , filmen.
Artiklar i länk, till ornis svecica, Ann-Katrin AX Sjögren, Jonas Waldenström. https://journals.lub.lu.se/os/article/view/22427/20681 https://journals.lub.lu.se/os/article/view/22427