Rookery
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<speciesfyi-glossary slug="rookery"></speciesfyi-glossary>Definition
A breeding colony of birds, particularly colonial-nesting species such as herons, penguins, or rooks.
Detailed Explanation
Colonial nesting evolved to reduce individual predation risk through group vigilance and mobbing defense. Colonies provide information about food locations — less successful foragers follow successful returners to productive areas. However, colonial nesting concentrates predation risk for eggs and chicks. Penguin rookeries in Antarctica contain millions of birds; their enormous guano deposits enrich local waters with nutrients, influencing marine food webs.