Roosevelt bull elk bugling during the rut, or breeding season. This incredible sound is made to show off to other bulls and the females. | Northwest Trek Wildlife Park

Bugle Boy! Sound up to listen to the current lead bull let out a big bugle today during elk rut (breeding season). | Northwest Trek Wildlife Park

During the elk mating season (rut), which generally happens from now through mid-October, bulls bugle to announce their availability and fitness to females and to warn and challenge other bulls. While this iconic song is a beautiful backdrop to fall in Yellowstone, remember that bull elk can be extremely dangerous during this time. Always keep at least 25 yards from elk. More elk bugling videos are available on our website: https://www.nps.gov/yell/learn/photosmultimedia/vl_elkbugling.htm. Note: