https://www.cbsnews.com/sanfrancisco/news/xerces-blue-butterfly-san-francisco-presidio-silvery-blue/
Extinct butterfly at San Francisco Presidio being replaced with close relative - CBS San Francisco
Apr 27, 2026 - In the late 19th century, San Francisco paved over its coastal dunes for development, taking with it a tiny, iridescent butterfly known as the Xerces Blue. By...
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