Residue distribution of anticoagulant rodenticides (ARs) in German districts.

Number (N) of red foxes (Vulpes vulpes) containing anticoagulant rodenticide (AR) residues in their livers and concentrations in μg/g of individuals where ARs were present: all anticoagulants (AR), brodifacoum (BR) and bromadiolone (BM). German districts are located in four federal states (Brandenburg: BB, Baden-Wuerttemberg: BW, Lower Saxony: LS, North Rhine-Westphalia: NW).