BROWN SPIDER WITH YELLOW LINES ON BOTH SIDES OF BODY LARGEST SPIDER I HAVE SEEN 40-45mm ACROSS
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I suppose we should mention that there is another species in this genus that looks very similar, Dolomedes plantarius, but that is very rare in Britain (only in a few sites in East Anglia, plus there appears to be a recent record in Glamorgan) and not found in Ireland as far as I know.
According to Dick Jones field guide to spiders, the green legs and light brown body of this individual suggests that it is not yet fully mature. These spiders can attract fish to the surface where they catch and eat them!
Entomologist and biological recorder
The thing you tend to notice about these is the thick legs, I've been wandering across bogs on a few occasions only to notice several of these beasties in the vegetation around me, a little unnerving at first.
...compared to a full grown female! I'm lucky to have breeding colonies of this awesome spider not far from me in Bournemouth. Every year I try and get shots of it - despite being arachnophobic I'm fascinated by them. Do you know an adult female can even take out a Hawker Dragonfly? Check out this vid I put together of the species...
the big ones are very unnerving, my first encounter with a large one was in my front hall on a balmy summers evening,I didn"t have a camera but it measured almost 45mm across .I can easily believe it would take down a dragonfly maybe even a small bird!
You might be interested in these spider observations
Lat/Lng: 52.5, -7.8
OS grid ref: SF0815