Are all Otiorhynchus species 'frost-resistant'? Or just O.sulcatus?

In November 2020, my family, one of my friends and I went to stay at Lake Quinault for a few days, and although I did not find more than a few beetles that weren’t smashed Nebria, or Haliplus, I did manage to find and collect(with permission and permit) a frozen Otiorhynchus sulcatus. I had found it around 4:30 am, and everything outdoors was covered in frost, so, naturally the weevil was frozen to the grass stem that it was on. I cut the blade of grass, and popped the vine weevil into a vial. An hour later, I had come back into the cabin after I fell in the lake when climbing(not a good idea) onto a mostly submerged log in the lake to get to a large water beetle. When I came inside, I set down my satchel near the fireplace, not realizing that someone had turned it on(gas fireplace) and when I later went back to get the few insects I had collected, I found that the frozen O.sulcatus had not only thawed out, but was live and well, though a bit shaky. -This specimen is now in the possession of Dr. Igor Kizub, Colorado, USA.

I have not yet found any other Otiorhynchus species that were frozen, which is why I have proposed this question of, are all Otiorhynchus species frost-resistant or not? Or, is it just O.sulcatus?

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The life histories of a number of species in the genus are not really known; however, many Otiorhynchus can overwinter as both larvae and adults.


@coniontises Thank you, I know very little overall of the genus, and would like to learn more even though it isn’t Carabidae.


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