We were out in the field briefly this past weekend and I encountered two different hermit crabs in these beautiful snail shells — Three-colored Top Snail (Calliostoma tricolor).
The snail is generally a more southern species, with most range descriptions describing their distribution from Santa Cruz south to Baja California, Mexico. Looking online, however, there are quite a few records north of Santa Cruz to at least Bolinas, and one outlier up in Mendocino County (Thanks, Michael!). So for the record, here's an observation from Sonoma County on 26 January 2024.
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