  In this note, we consider generalizations of the Cucker-Smale dynamical
system and we derive rigorously in Wasserstein's type topologies the mean-field
limit (and propagation of chaos) to the Vlasov-type equation introduced in
[12].Unlike previous results on the Cucker-Smale model, our approach is not
based on the empirical measures, but, using an Eulerian point of view
introduced in [8] in the Hamiltonian setting, we show the limit providing
explicit constants.%Using an Eulerian point of view introduced in \cite{gmp} in
the Hamiltonian setting, we don't use empirical measures and provide explicit
constants. Moreover, for non strictly Cucker-Smale particles dynamics, we also
give an insight on what induces a flocking behavior of the solution to the
Vlasov equation to the - unknown a priori - flocking properties of the original
particle system.
