Hybrid Snakes Forum???

I have a question, I live in North Carolina, and I was in the mountains about a month ago and my boyfriend and I came across what looked to be a black snake, so we were trying to pick it up, not harming it at all, but it was swift to get away, and it as it got about a foot away from us it curled up and started to shake its tail, it was a rattle snake, mixed with a black snake, it seemed like it at least. I was wondering if this was possible, it was black but if you looked closely you could see white in it and white on its belly.

Many colubrids in the U.S. do this; they rattle their tails against the dead vegetation, creating a sound not unlike that of rattlesnakes, deterring possible predators.

Colubrids and pit-vipers cannot mix.