  We study the harvesting of entanglement and mutual information by
Unruh-DeWitt particle detectors from thermal and squeezed coherent field
states. We prove (for arbitrary spatial dimensions, switching profiles and
detector smearings) that while the entanglement harvesting ability of detectors
decreases monotonically with the field temperature $T$, harvested mutual
information grows linearly with $T$. We also show that entanglement harvesting
from a general squeezed coherent state is independent of the coherent
amplitude, but depends strongly on the squeezing amplitude. Moreover, we find
that highly squeezed states i) allow for detectors to harvest much more
entanglement than from the vacuum, and ii) ensure that the entanglement
harvested does not decay with their spatial separation. Finally we analyze the
spatial inhomogeneity of squeezed states and its influence on harvesting, and
investigate how much entanglement one can actually extract from squeezed states
when the squeezing is bandlimited.
