In my MSc thesis, I will investigate the effect of small structures, such as branch and stone piles, on mustelids in the Swiss intensively used agricultural landscape. M. erminea and M. nivalis have been identified as target and indicator species in the framework of environmental objectives related to agriculture. Thus, monitoring mustelids in relation to small structures can provide insight into the effect of their placement in the landscape. I will use detection dogs and camera traps as passive sampling methods to monitor the occurrence of stoats (M. erminea) and weasels (M. nivalis) in the landscape in relation to the presence or absence of small structures. Then, I aim to statistically asses their habitat preferences. Additionally, camera trapping data will allow for the investigation of habitat preferences of small mammal species occurring on the same structures. Ultimately, the project shall deliver recommendations on where and how to place small structures in the agricultural landscape.