what is a group of snakes called
It's a good question because they aren't normally found in groups, however a group of snakes is usually called a "nest of snakes" or a "bed of snakes". If you're referring to rattlesnakes, a group is called a "rhumba".
Personally, I'd call a group of snakes, scary or history, because I'd be running so fast, they would become a distant part of my history- Just sayin'...
Hope this helps.
Usually a nest but other terms are 'pit' or 'bed'.