Seaside sparrows at Cooks Beach have their own “dialect.” Rowan University researchers monitor their songs as a way to track salt marsh health.

Which meant a nonnative bird was killing our native birds. House sparrows, originally from Europe and Asia, were brought to Brooklyn in the 1850s to control caterpillars.

Since 2018, Hong Kong has maintained a sparrow population between 200,000 and 250,000, according to the Hong Kong Bird Watching Society. John Chung Chun-ting, a research officer of the society ...