Venomous Spiders Are the 2021 Version of Murder Hornets Remember last year (not that you would want to) when America was invaded by 'murder hornets'? Now imagine having to deal with venomous spiders in 2021 because some already have had to face them. The University of Michigan's campus library was forced to close, not because of anything happening with an ongoing pandemic, but because venomous spiders were on the loose. Mediterranean recluse spiders were found in the Shapiro Library on the campus in Ann Arbor, MI. The library was then shut down for two days due to the invasion of the insects.