Disclosed are compounds of formula (I) or pesticidally acceptable salts thereof wherein, for example, W is ═CR8— or ═C(NR9R10)—, R8 is halogen, R9 and R10 are independently of one another hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, heterocyclyl, aralkyl or heterocyclylalkyl, R1 is cyano, methyl, trifluoromethyl or —CS—NH2, R2 is C1-C6-alkyl, C1-C6-haloalkyl, R3 is hydrogen, alkyl or cycloalkyl, R4 and R5 are alkenyl, alkynyl or cycloalkyl, R6 is haloalkyl, haloalkoxy, halogen or —SF5, R7 is halogen or alkyl, and n is 0, 1 or 2. These compounds can be used for controlling pests, especially by treatment of domestic animals.