Mysterious hole in the ground

Hi Benjamin, Thanks for writing.  I’m pretty sure that’s a spider hole.  There are at least two large spiders in CA that make holes like that and line them with silk.   One is the Carolina wolf spider (Hogna carolinensis), and the other is the California tarantula (Aphonopelma sp.).  Though I have not tried this, apparently, one method to get a burrowing spider to show itself is to drip water into the burrow.  Probably very annoying to the spider, though.  🙂

In case you are worried, although both of these large spiders can bite, neither is considered to be dangerous to people.  Tom

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