# Bay Checkerspot Butterfly **Domain:** Ecology / Conservation / Population Dynamics **Doc Type:** Canonical Species Node **Maturity:** Developed ## Definition The **Bay checkerspot butterfly** (_Euphydryas editha bayensis_) is a threatened subspecies native to the San Francisco Bay region and strongly associated with serpentine grassland plant communities. ## Evolutionary Nexus Paul Ehrlich and colleagues studied checkerspot populations at Stanford's Jasper Ridge for decades. The work helped make the butterfly a model for population fluctuation, local extinction and conservation. The Jasper Ridge population disappeared by the late 1990s, showing that intensive knowledge does not guarantee persistence. [[articles/The Evolutionary Roots of Silicon Valley|The Evolutionary Roots of Silicon Valley]] reads patch populations as distributed persistence. The analogy requires a correction: redundancy works only when habitat remains viable and movement among patches is possible. Copies trapped in correlated failure domains do not create resilience. ## Continuity Context For distributed intelligence, the checkerspot provides a biological warning against equating multiple sites with sovereignty. Network topology, resource access and recolonization routes determine whether a population can actually recover. ## Sources / Provenance - Stanford Jasper Ridge, long-term checkerspot studies: https://jrbp.stanford.edu/longterm-studies-bay-checkerspot-butterfly-and-feasibility-reintroduction - Stanford Habitat Conservation Plan: https://hcp.stanford.edu/serpentine.html ## See Also [[wiki/Metapopulation|Metapopulation]], [[wiki/Serpentine Ecology|Serpentine Ecology]], [[wiki/Distributed Intelligence|Distributed Intelligence]], [[wiki/Correlated Failure|Correlated Failure]]