Assertion: heron's nest | /r/AtLocation | the ground
Facets:
Source sentences:
text: If the nest is on the ground, they will usually walk around the nest for a few days before taking their first flight.
text: Nests can be on the ground, on rocks or reefs with no vegetation, or atop trees, which may be alive when a cormorant colony first forms but typically die after a few years from the guano build-up.