  We study the temperature (T) dependence of the dynamical structure factor of
the chiral spin liquid phase of Kitaev's honeycomb model. We find, using a
recently developed analytical approach, direct signatures of the Majorana modes
associated with the non-Abelian Z_2 vortices (visons). In particular, a
characteristic multiplet of discrete peaks at low but nonzero-T and its field
dependence reflect the existence of thermally activated visons whose varying
separation yields different splittings of the Majorana `zero' modes. The
resonant processes involved are specific to the Majorana modes, and will
persist even in the presence of weak non-integrable interactions.
