Microtus arvalis as the intermediate host of a coccidian from the kestrel (Falco tinnunculus).
D000818:Animals; D003411:Arvicolinae / Q000469:parasitology*; D001717:Birds / Q000469:parasitology*; D012377:Rodentia / Q000469:parasitology*; D012522:Sarcocystis / Q000254:growth & development*