I just found your website and it is amazing! I think I will be using it frequently as I have just moved to Arizona and there seems to be quite a variety of bugs out here that I have never seen. My sons found this guy outside our door today. He is about 7.5cm long and has a shiny black body. Do you know what he is? Thanks,
This is one of the Long-Horned Beetles in the genus Derobrachus. They are relatively common in Arizona.