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On a recent visit to Travis Wetland we saw many webs of the nursery web spider (Dolomedes minor), which builds a nest to protect its young.
The spiders typically build these nursery in low growing shrubs, such as this Coprosma bush. The nest below is probably about to be vacated by the spiderlings.
We did get a (somewhat blurry!) video of the seething mass of spiderlings.
We didn’t see any of the adult spiders, though apparently the females were probably hiding nearby – they guard the nests at night. The nest below is now empty, though there is a spider on the bottom left, perhaps a juvenile?
There is detailed information about the Dolomedes genus in New Zealand here. There are four species here, with Dolomedes minor being the most common.
For more photos, including of the adult spiders, see here.