What is a hallmark trait of the Cervidae family shared by the male elk (bull)?
Answer
Annually shed, branching antlers.
A key trait of the Cervidae family, exhibited by the male elk, is carrying antlers that are shed and then regrown every year.

Related Questions
To which biological family does the elk belong?What is the scientific species name designated for the North American Elk, or Wapiti?In Europe, which animal is commonly referred to as an elk?What is the Order classification for elk, indicating they walk on hooves with an even number of digits?What is the scientific classification for the Old World Red Deer?Which major subspecies of North American elk is generally considered the largest?What is the current conservation status or history of the Eastern Elk (*C. c. canadensis*)?What genus name contains the North American elk species?What is a hallmark trait of the Cervidae family shared by the male elk (bull)?Which subspecies of *Cervus canadensis* is described as being smaller and historically inhabiting drier areas of California?