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True BugsThasus neocalifornicus
Apparently you received three reports of Thasus neocalifornicus on June 21 in Southern Arizona. Here’s another report, and two images I grabbed on the exact same day. Unfortunately, "my" insect wasn’t as romantic as a bunch of them crawling around in mesquite trees. It was a solitary one crawling on a styrofoam coffee cup someone left behind on a brick wall at The University of Arizona in Tucson. Why all on the same day, in the same general location, and why have I never seen this insect here before although I have lived in Arizona for nearly 15 years?
Best regards,
Pamela D.


Hi Pamela,
First of all, we love your photo with the styrofoam cup. It appeals to our sense of humor. Now addressing your point, perhaps we should wax philosophically about the genius of nature. Something in the insects life cycle triggers the insects to appear during a specific season to better insure the survival of the species. If all the members of a given species mature at the same time, chances are better for finding a mate. Some critters are off schedule, and if they happen to find a mate, it even further ensures success for the species. As to this year being a year that Thasus neocalifornicus is proliferating, I’m sure the unseasonal rains have contributed to the population explosion.

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