What Does A Black Racer Snake Look Like And Is It Poisonous?

The poor thing. It sounds like a racer, which is a constrictor, and isn't poisonous. You can type in racer snakes in the google search bar, and then, when you get to it, click on images. You should be able to find it in there. Hope this helps, good luck.

Black racers are solid black.  

The Eastern Mud Snake is Black, with a checkerboard belly of black and pinkish to white scales. Can grow to 6-1/2 feet.  Usually found near swamps, lakes, streams.  Highly aquatic.

The Black Rat Snake is nearly full black in the back, but may show some white speckles, whereas its chin and belly have a lot of white markings.  One way to distinguish this from the mud snake is it generally has a slightly raised ridge of scales down it's middle.  These climb trees, and generally feed on rodents, birds, and bird eggs.  They also grow to more than 6 feet.

If it had an orange belly, it would be the Black Swamp Snake.

Whichever breed it is, I think you have a juvenile if it is farily small , due to the lighter marking on the back.

I dont know. I may never know. My husband killed a snake last sunday. He describe the black with diamond on the back. The belly were yellow dot. Can you describe this snake?