When Lauren Schmidtke found an interesting-looking spider at her sister's house in Airdrie, she wasn't sure what exactly it was —  until she took a closer look at a photo of it.

"I zoomed in and, sure enough, there was a perfect hourglass," she said, referring to one of the most identifying traits of a female black widow.

"I honestly didn't realize," Schmidtke said. "I know how dangerous they are."