The research by MRI PAS on the dynamics of parasite infection level in American mink has shown that non-native species are released from enemy pressure only in the first phase of invasion and the infection is also modulated by host demographics and season. There was a significant increase in the number of parasites with the time since the populations of American mink were established. This is best illustrated by the latest comic book by Tomasz Samojlik. Details in the original work published in “Ecography” at this address