Assertion: blackbird's nest | /r/AtLocation | unattended
Facets:
value: such as marsh wrens
type: OTHER
Source sentences:
text: Ravens and grazers feed on eggs, and even small chicks, if the nest is left unattended such as Marsh wrens, who destroy the eggs, at least sometimes drinking from them, and peck the nestlings to death.
text: The cowbird will watch for when its host lays eggs, and when the nest is left unattended, the female will come in and lay its own eggs.