I haven’t found any of these boas yet inperson (although I hope to…), but I’ve been incredibly confused by the taxonomy and was hoping someone could maybe clarify this. Apparently there are two recognized species of rosy boa on iNaturalist, common names coastal and desert rosy boa.
Here (http://www.californiaherps.com/noncal/baja/bajasnakes/pages/l.trivirgata.html) there is a map showing that the desert rosy boa is only in Baja, Sonora and Arizona while all of the California snakes are coastal rosy boas. On the other hand this source (https://animaldiversity.org/accounts/Charina_trivirgata/) claims that trivirgata is in California. To make matters worse half the websites I can find list them in subspecies instead, and I don’t know if there are even easily seen physical differences between the species. And on iNat itself, there are lots and lots of desert rosy boa IDs in California.
Any boa experts out there?