rookery
US /ˈrʊk.ɚ.i/
UK /ˈrʊk.ɚ.i/

1.
a colony of breeding birds, typically rooks, or their nests
:
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The old oak tree was home to a large rookery.
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We could hear the cawing from the distant rookery.
2.
a breeding ground for seals or other pinnipeds
:
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The rocky island was a large rookery for seals.
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Tourists often visit the seal rookery to observe the animals.