This is a quote from a Swedish research paper studying the eating preferences of animals. It turns out chinaware are not consumed often by avians, they prefer electronic appliances like printers and iPhones instead.
So, according to duo, "they" eat turtles (whoever "they" is), and now the ducks do not eat the plates? Duo has a strange obsession with strange things...
Duolingo needs to realize that in English " don't is the same as "do not"