The present invention relates to 1-(azolin-2-yl)amino-1,2-diphenylethane compounds of the formula I and to their salts which are useful for combating animal pests. The invention also relates to a method for controlling animal pests by using these compounds, to seed and to an agricultural and veterinary composition comprising said compounds. wherein A is a radical of formulae A.1 or A.2 wherein # denotes the bond to the remaining compound of formula I, X is selected from O, S and NRX, R1 is selected from the group consisting of —ORA, —NRB1RB2, —C(═O)—RC, —C(═O)—ORD, —C(═O)—SRE, —C(═O)—NRB1RB2′, —C(═S)—RC′, —C(═S)—ORD′, —C(═S)—SRE′, —C(═S)—NRB1RB2, —C(═NR1a)—RC′, —C(═NR1b)—ORD′, —C(═NR1c)—SRE′, —C(═NR1d)—NRB1RB2, —S(═O)—RF, —S(═O)2—RG, —S(═O)2—NRB1RB2′, —P(═O)RH1RH2, —P(═S)RH1RH2, —B—C(═O)—RI, —B—O—C(═O)—RI, —B—S—C(═O)—RI, —B—N(RJ)—C(═O)—RK, —B—C(═S)—RK, —B—O—C(═S)—RK, —B—S—C(═S)—RK, —B—N(RJ)—C(═S)—RK, C1-C8-alkenyl, C1-C8-alkynyl, C3-C8-cycloalkyl, which is unsubstituted or may carry 1 to 4 substituents R1e, naphthyl, which is unsubstituted or may carry 1 to 4 substituents R1f, a saturated or partially unsaturated heterocycle, which is unsubstituted or may carry 1 to 4 substituents R1g, hetaryl, which is unsubstituted or may carry 1 to 4 substituents R1h, and C1-C6-alkyl, which carries a radical selected from the group consisting of —NR1iR1j, C1-C4-alkoxycarbonyl, C3-C8-cycloalkyl, aryl, aryloxy, arylthio, heterocyclyl, heterocyclyloxy and heterocyclylthio, R2, R3, R4, R5, R6 and R7 are each independently hydrogen, halogen, OH, SH, NH2, SO3H, COOH, cyano, nitro, C1-C6-alkyl, C1-C6-alkoxy, C1-C6-alkylamino etc.