If you ever spot a spider with a violin-shaped marking on its back, it’s time to back away and call pest control—don’t try to capture or kill it yourself.

But spiders aren’t the only concern.

Another dangerous intruder that can find its way into homes—especially in warmer climates—is the coral snake. Known for its bright red, yellow, and black bands, this colorful serpent is also highly venomous. It’s often mistaken for its non-venomous lookalike, the king snake, which has a similar pattern. The rhyme “Red touch yellow, kill a fellow; red touch black, friend of Jack” helps distinguish the two, but when you’re startled, you may not have time to recite poetry. If you see a snake indoors and aren’t 100% sure what it is, keep your distance and alert animal control