Fecal Sampling of Carnivore Species

In the materials for this study, a total of 322 fecal samples from 6 carnivore species (raccoon (Procyon lotor; n = 65), raccoon dog (Nyctereutes procyonides; n = 87), red fox (Vulpes vulpes; n = 50), European badger (Meles meles; n = 45), pine martens (Martes martes; n = 24), and beech martens (Martes foina; n = 51)) were collected during the period of 2017–2019. All fecal samples were obtained during necropsy from animals shot during a predator control operation or road-killed animals from Ruszów Forestry (51°24′00.1″ N 15°10′12.2″ E), Bory Dolnośląskie, the Lower Silesian District in Poland, where, uniquely, the invasive and native carnivore species co-occur in the same habitat (Figure 1). All samples were kept at −20 °C until further analysis.