Questions about the range and abundance of Dysdera crocata (and Lithobius forficatus)

Wayfarin

Arachnoknight
Joined
Mar 20, 2022
Messages
237
Hello, invertebrate-keeping folks! I happen to be new to this forum, and the keeping of invertebrates, but I have questions concerning the well-known spider, Dysdera crocata, that I've been meaning to ask.

Does this spider live in northern New England, or more specifically, northern New Hampshire? And if so, how abundant is it?
As you might have guessed, that's where I live.

I suppose that only people who actually live in northern NH, or at least have been here, can answer this one. But the reason that I can't answer the question myself is because I am new to this region and have never lived this far north before. We recently moved from CT, which probably had these spiders, although I have never seen one, to northern NH, or more specifically, Groveton. It is a fairly suburban town, but I'm aware that Dysdera crocata is not deterred by urbanization. It's freezing cold here in the winter, though.

The reason I'm asking? I was thinking of capturing a specimen or two, or hopefully enough to breed, from our own yard. They're not actually native to North America to begin with, so it's obviously legal. I'd be willing to build a brush pile in order to make our yard more appealing to them. Or a wood pile to attract woodlice. Or whatever kind of habitat that they prefer. But I wouldn't want to waste my time if they don't even live here.

The range map on Wikipedia would seem to suggest that they live around here, but what really matters is not just their presence, but their abundance. Are they common enough to be encountered?

I suppose that I could just try to order some specimens online, but Dysdera crocata is almost never available. If I could get my hands on both sexes, I would probably breed them so that this underrated species becomes more readily available for other enthusiasts. But what's nice about catching them from the wild is that they can always be released if I can't take care of them anymore.
I suppose we could also look for specimens outside of our yard, even somewhere as far south as MA, where Dysdera crocata is apparently quite common. I don't think people will care if we are collecting a nonnative species.

On a side note, I was also wondering if the centipede, Lithobius forficatus, another nonnative species, could be found around here. But I'm sure it probably could. So that's not really my main concern.

If anyone would be willing to give their input, I'd be grateful. Thank you! God bless!
 

Albireo Wulfbooper

Arachnoprince
Joined
Aug 1, 2019
Messages
1,604
Dysdera crocata are certainly common in the Toronto area, and I know they have plenty in Massachusetts, so I'd be surprised if they weren't reasonably widespread in your area. Freezing winters don't seem to be a problem for them. I believe Lithobius forficatus are also in the area but not sure how common they are.
 

Biollantefan54

Arachnoking
Old Timer
Joined
Jul 3, 2012
Messages
2,307
My suggestion would be to start flipping some boards. That’s where I find both of these species, much further south, but I’m sure it’d be the same
 

Wayfarin

Arachnoknight
Joined
Mar 20, 2022
Messages
237
Dysdera crocata are certainly common in the Toronto area, and I know they have plenty in Massachusetts, so I'd be surprised if they weren't reasonably widespread in your area. Freezing winters don't seem to be a problem for them. I believe Lithobius forficatus are also in the area but not sure how common they are.
Well, I sure hope that they can be found here. Toronto is pretty far north, but I think that Groveton, NH is still further north. I've heard that Dysdera crocata is absent from much of the northernmost reaches of the UK, so cold temperatures must have some kind of effect on them.

My suggestion would be to start flipping some boards. That’s where I find both of these species, much further south, but I’m sure it’d be the same
Well, first we'd have to lay down some wooden boards. We don't exactly have wooden boards all over our yard, but we could lay some down to create ideal habitat. I just hope we wouldn't be wasting our time looking for a spider that doesn't even live around here. In the beginning, I thought I wanted to live where there were longer winters, and less "bugs" in the summer, but now... I'm hoping that these "creepy-crawlies" are still around at least somewhat! I honestly didn't expect that certain common species would be completely absent this far north!
 

Albireo Wulfbooper

Arachnoprince
Joined
Aug 1, 2019
Messages
1,604
Well, first we'd have to lay down some wooden boards. We don't exactly have wooden boards all over our yard, but we could lay some down to create ideal habitat. I just hope we wouldn't be wasting our time looking for a spider that doesn't even live around here. In the beginning, I thought I wanted to live where there were longer winters, and less "bugs" in the summer, but now... I'm hoping that these "creepy-crawlies" are still around at least somewhat! I honestly didn't expect that certain common species would be completely absent this far north!
Have you checked on a site like iNaturalist? People post geotagged arthropod photos there. You can search by species name and then just zoom it to your location and see if any have been reported in your area.
 

Biollantefan54

Arachnoking
Old Timer
Joined
Jul 3, 2012
Messages
2,307
Well, first we'd have to lay down some wooden boards. We don't exactly have wooden boards all over our yard, but we could lay some down to create ideal habitat. I just hope we wouldn't be wasting our time looking for a spider that doesn't even live around here. In the beginning, I thought I wanted to live where there were longer winters, and less "bugs" in the summer, but now... I'm hoping that these "creepy-crawlies" are still around at least somewhat! I honestly didn't expect that certain common species would be completely absent this far north!
Both have been found in New Hampshire on bugguide so I don’t see why you couldn’t find them. They may not be super common but they should be there
 

Wayfarin

Arachnoknight
Joined
Mar 20, 2022
Messages
237
Have you checked on a site like iNaturalist? People post geotagged arthropod photos there. You can search by species name and then just zoom it to your location and see if any have been reported in your area.
I just checked out that website, and I'm very pleased to see that Dysdera crocata has been reported further north than Groveton! Namely, in Montreal and Ottawa, Canada. I can't find any reports from Groveton itself, but it's apparently not inhospitable. Apparently, Groveton and these Canadian towns have similar temperatures, and there is even some evidence to suggest that Groveton gets more snow, but for the most part, I can see them living here. I guess it's time to start searching!

Both have been found in New Hampshire on bugguide so I don’t see why you couldn’t find them. They may not be super common but they should be there
I've seen posts of both species on Bugguide, but all of them were, to my knowledge, further south. I live in almost the northernmost reaches of New Hampshire. Closer to Canada. But there have apparently been reports of the species from Canada as well.
 
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