The present invention relates to novel pyridine compounds of the formulae I and II, to their salts, to their tautomers, to their N-oxides, and to the salts of these N-oxides or tautomers. The compounds are useful for combating or controlling invertebrate pests, in particular arthropod pests. The invention also relates to a method for controlling in-vertebrate pests by using these compounds. The invention further relates to plant propagation material and to agricultural compositions comprising said compounds. wherein A is a radical of the formulae A1, A2, A3, A4, A5 or A6 wherein # denotes the binding site to the remainder of formulae I or II Z is O, S or N-RN X1 is S, O or NR1a X2 is OR2a, NR2bR2c, S(O)mR2d X3 is a lone pair or oxygen R1, R2 and R3 are, inter alia, hydrogen, and RA1, RA2RA3RA4, RA5, RA6 and RN, are as defined in claim 1.
