R - red center: Brown recluse spider bites usually don’t have a red ... While some have a violin-shaped marking on their back, this feature is not unique to them and is found on other spider ...

While both of these spiders have glossy black bodies, the redback spider features brown males ... but redback spiders have ...

The black spider is tiny, shady black, with a red hourglass mark on ... and it is more venomous. The brown spider is long with a violin mark on the upper back, and lives in hot, dry abandoned ...