- My dad has a spider in his back yard that he is thinking of removing. I was thinking if I found out what it was he might not have to. The burrow is about a centimetre in diameter, and doesn't have trip-lines or any other visible silk. It sounds quite shallow, so that he can see its face and fangs when he looks in. The fangs are the straight up-and-down sort like a funnelweb or trapdoor spider has. Is there any way to identify it without catching it? Or to otherwise determine whether it poses any risk?