A Black Widow spider is seen through a basement window of a home in Arvada, Colorado on Saturday, August 13, 2022. (Photo by Patrick Traylor/The Denver Post) ...

So it's not a hugely species-diverse area, but documented between 600 and 700 different species of spiders that live in Colorado. If you spot a big hairy spider around here it's likely a tarantula.

Schwarz hadn’t given spiders much thought. But when he had the chance to study a species known as the long-jawed orb weaver spider on the islands of Oahu, Maui and Hawai’i, his interest in the ...