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Project Noah Nature School
Biologist and Entomologist at Essig Museum of Entomology at UC Berkeley
Oakland California
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I've never heard that common name before. We call them pseudoscorpions in the U.S. Nice spotting!
Yes, this appears to be a paper wasp nest.
Beautiful creature, nice spotting!
Looks like a burying (carrion) beetle to me, Family Sylphidae.
Based on the wing venation and the antennae, I say this is one of the hoppers (Order Hemiptera), not a moth.
You're welcome! I used to wonder what those trees were too. They look similar to Walnut, so I'd get confused by those leaves!
They do resemble roly-polys, but these are molluscs and roly-polys (isopods) are crustaceans.
Wish there were more pictures, but it looks to me like Tree of Heaven, Alianthus altissima. It was introduced into California from China during the gold rush and has since spread all over the state. It grows like a weed in the central valley.
