Recently I’ve been going out on a walk every night and looking for wolf spiders. You can find many by putting on a headlamp and shining it through the grass or leaves, you will see the greenish glint off the eyes of wolf spiders on the ground, but in the last 2 weeks there were very little in my Illinois town and none here in Minnesota. Why is this? There seems to be no shortage of orbweavers and other web builders. I’ve looked it up and late summer is when wolf spiders are most active, so why can’t I find any?
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Hmm, I don’t know. Come to think, I haven’t seen any in Arkansas lately, either.
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If they are most often observed by people actively going out at night with a headlamp to look for them, is there something about the weather in your area recently that has caused either the spiders or the other observers to be less active?
Or were there conditions earlier in the summer that may have caused them to be less successful at reproducing or surviving, so there are fewer?
Or, are they the type of organisms whose population abundance ebbs and flows cyclically over the years? Have you checked the statistics for previous years?
There has been an abundance of rainfall semi recently in my town but I’m not sure about Minnesota, in my town I can still find them after rain, but just in smaller numbers. In the past week I’ve been to Minneapolis, Duluth, and crane lake and I haven’t been able to find a single one, am I just too far north? I’ll definitely check out some statistics.
Links to statistics would be appreciated as well👍
Wolf Spider observations this month in Minnesota (via Explore tab and filtering for this month): https://www.inaturalist.org/observations?d1=2025-07-01&place_id=38&subview=table&taxon_id=47416
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Interesting, it’s likely a combination of the temperatures and months, looks like I was just a little too late. Thanks!
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FWIW, you can go to its taxon page and filter by Minnesota then check out the charts.
Looks like they tend to peak in May/June then decline:
(although I’m sure there’s a bunch of caveats with these data)
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