6230 Found this spider inside our house in Southwestern Ontario. My husband has woken up with a few bites that swelled up this week and we’re looking for the culprit. Is this spider harmful to humans or pets? From Bothwell, Ontario.

Number 6230 – This is a crab spider (family Thomisidae); Click here for an example. These are ambush predators that lay in wait for potential meals to get within grabbing distance. They are harmless to humans and pets.