  Levinson and Montgomery proved that the Riemann zeta-function $\zeta(s)$ and
its derivative have approximately the same number of non-real zeros left of the
critical line. R. Spira showed that $\zeta'(1/2+it)=0$ implies
$\zeta(1/2+it)=0$. Here we obtain that in small areas located to the left of
the critical line and near it the functions $\zeta(s)$ and $\zeta'(s)$ have the
same number of zeros. We prove our result for more general zeta-functions from
the extended Selberg class $S$. We also consider zero trajectories of a certain
family of zeta-functions from $S$.
