Odd behaviour for a spider!

[mystic.smeg]

I have two New Foundlands that poop professionally for England.

On cleaning up this by product of feeding them (trying to be as polite as possible), I saw a small and very aggressive brown coloured (camouflaged) spider sitting on one "brown island". It was defending its ground valiantly as I tried to move it on with the tip of a trowel. It became obvious that this was an evolutionary adaptation to its environment; it was using the attraction of the "matter" to flies, and I assume, it would pounce on them from there instead of using a web. However, it struck me that this behaviour is very un-spider like. Is this common or a recent adaptation?

If it's a new spiecies, can I name it "Faecus Arachnoid"?

[demicav]

I would hazard a guess that this was a Wolf spider. At this time of the year the ground is full of them. As far as I know they don't build a web but hunt on the ground, bit like a Wolf really.