These are night hunters, emerging after dark to take advantage of night-flying insects. I saw these by the Interpretive Centre just after midnight, when Diane and I came back from mothing. There were 7 of these spiders, but this was by far the biggest. They were very clever, positioning themselves around the light so that they could snatch the moths who came to the lights but got snared by the webs instead. Next morning, not a spider to be seen!