Moose, alces alces. Two males / bulls fighting; locking antlers during rutting season north america

strike mal horizontals warm antler two aggressive mammal mammals animals elchin horizontal buck adult deer fighting endotherm male artiodactyla adults warm blooded antlers season stags charges rutting fall vertebrate striking mature fauna bull charge wildlife males vertebrates strikes mammilia zoology aggression cervidae locking alces vertebrates stag bulls ungulate tundra herbivores toed even herbivore standing bucks blooded herbivorous moose charging nature ungulates endothermic vertebrate hoofed animal herbivora 1030 11926