Rookery (noun)

1. A large group of birds, especially crows or rooks, nesting or living together.
2. A place where many people live in crowded or undesirable conditions.

Origin:

The origin of the word 'rookery' comes from the old english 'roc' meaning 'crow' and the suffix '-ery' meaning 'place of'. it was originally used to refer to a colony of crows.

Examples:

1. The large rookery on the cliff was a noisy and busy place during breeding season.
2. The ornithologist observed the rookery to study the behavior of the birds.
3. She walked past the rookery and heard the cacophony of bird calls.
4. The rookery was home to hundreds of crows, who were raising their young.
5. The city officials sought to improve the living conditions in the rookery, which was known for its squalor and poverty.