Orb weaving spider

6647.    Found September 8th in house, but patio door had been open a lot of the day on the 7th. Calgary, AB. Canada

 

Number 6647. This is an orb weaving spider in the genus Araneus, likely Araneus marmoreus (marbled orb-weaver), a highly variable species. Click here for an example. All orb weavers are harmless to humans.