The North American Elk or Wapiti
(Shawnee Indian name meaning white rump)
The males have large antlers, new antlers grow each year
the antlers are shed (dropped) in late winter, begin growing in spring
and have velvet covering in spring and summer.
The velvet rubs off in late summer,they do this by rubbing the antlers on tree trunks and branches and it can bleed as well, leaving light grey antlers .
Took this on the way to Banff.