Here's a video from Yosemite N.P. on Facebook, showing Sierra newts wrestling -- it's mating season. Pretty fascinating.

Yosemite National Park
One of our rangers stumbled upon quite the scene in the foothills: Sierra newts wrestling and mating. This video shows all the action! To learn more about what you're seeing in the video, visit   Newts Wrestling.

I think the video will play if you click on the picture.