What is this?

Asked May 15, 2016, 10:54 PM EDT

I found this spider patrolling my window back and forth and it darts to the side whenever I move. What exactly is it? I found it in my attic, my room. It looked a lot larger than the spiders I usually see.

Pulaski County Arkansas spiders

2 Responses

The spider in your photo is a tan jumping spider, scientific name: Platycryptus undatus, in the family Salticidae. As their name implies, jumping spiders are heavy-bodied, short-legged spiders that are capable of jumping. They do not spin webs to capture prey, rather they wander around on foliage, bark, or the walls of buildings searching for prey items. Their front pair of eyes are greatly enlarged and they have excellent vision for a spider. This is why the spider was darting around whenever you moved. It was seeing you moving and was positioning itself to get a better view of you in case it sensed you might be a threat and it needed to escape. The tan jumping spider is one of the largest of the hundreds of species of jumping spiders that occur in the U.S. Jumping spiders, are very docile, rarely bite and basically harmless to humans. I have included some links below to websites with more information about jumping spiders.

https://en.wikipedia.org/wiki/Platycryptus_undatus

https://en.wikipedia.org/wiki/Jumping_spider

http://bugguide.net/node/view/3354

Thank you for replying. I'm so glad that I didn't kill it, I already lived with brown recluses for years and I just deemed that spider worthy to live because I thought that it looked awesome and I have never seen one of those before.