The click beetles are members of the beetle family Elateria. They have a spine on one part of their exoskelton that fits into a groove in another part. The beetle can use it to make a suddenly click and dramatic popping movement. It uses this to evade predation and to right itself from laying on its back .There are about 965 species in North America, so don’t ask me which one it is specifically. On this on you can see alarming looking spots on the back which are likely to frighted bird predators.
Younger son and a friend found this one in a wood pile. They had no idea what it was and thought it was dead. I initially filmed it for about 6 minutes before I gave up . It just laid there. Then later, it popped around a lot. I eventually released it back to the wood pile. This one was about 3cm, which you can see in the photos. Here is a short video of it clicking. This is 5 seconds of what was a 5 minute clip.