More than a decade of observation in Seattle suburbs shows where sensitive bird species won’t go

A thirty-year University of Washington study on suburban birds has found that sensitive species can survive development—as long as developers preserve native plants and trees. As UW News reports, researchers categorized birds into three groups: avoiders like chickadees and woodpeckers that flee urban areas, adapters like sparrows with variable responses, and exploiters including crows that thrive around humans. Published in Scientific Reports, the research shows that maintained tree cover and native vegetation allow native bird species to persist in developed areas. The finding comes at a critical moment—Seattle's bird population has dropped twenty-one percent since the nineteen-nineties, even as developers rapidly convert timberland to housing. Researcher Jack DeLap emphasizes that this reveals a choice for developers: habitat and human expansion can coexist if builders intentionally preserve vegetation and tree cover during planning.

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