  We study the effects of horizons on the entanglement harvested between two
Unruh-DeWitt detectors via the use of moving mirrors with and without strict
horizons. The entanglement reveals the sensitivity of the entanglement
harvested to the global dynamics of the trajectories disclosing aspects of the
effect that global information loss (where incoming massless scalar field modes
from past null infinity cannot reach right future null infinity) has on local
particle detectors. We also show that entanglement harvesting is insensitive to
the sign of emitted radiation flux.
