As far as I can recognize, the beetle in the second picture should belong to the family Elateridae (often called 'click beetles') which are able to spring when lying on the back by using a special click mechanism.
You are viewing a single comment's thread from:
Very good information of the link @jaki01. Just as it happened with en insecto, it clicked in one shot and left. I thought it was a cockroach because of its appearance, thank you very much for sharing, I am still learning. Best regards.
That is one of the aims of this community: to increase the knowledge about insects and arthropods. Nice to read that my comment was helpful!