06/24/2025
This is so sad to see! And learning about years later. I can’t help but blame our ancestors. Because it’s their fault. Humans have been destroying habitats for a long while. When will we stop?
The Xerces blue butterfly (Glaucopsyche xerces), native to the coastal sand dunes of San Francisco, California, was officially declared extinct in the 1940s.
It holds the tragic distinction of being the first North American butterfly species known to have become extinct due to human activity.
Urban development in the San Francisco area during the early 20th century led to the destruction of its habitat, especially the native vegetation it depended on for survival, including plants in the lupine family.
Pesticide use and the loss of its host plants contributed to its decline. Efforts to conserve insects were virtually nonexistent at the time, and by the time its disappearance was noticed, it was already too late.
Its extinction has since become a symbolic example in conservation biology, highlighting the urgent need for habitat preservation and early intervention in species protection.
