Deer antlers are unique among mammalian skeletal structures in that they are shed and regenerated annually. The process of antler shedding and regeneration is known as “casting” and usually occurs during the months of August and September in North America. Antler casting is thought to be triggered by a combination of factors including declining levels of testosterone changes in photoperiod (day length) and decreasing food availability.
While the exact reason why deer antlers are shed each year is still unknown it is thought to be related to the deer’s natural life cycle. Antler casting is a way for the deer to rid itself of old damaged or unnecessary antlers and to make room for the growth of new ones. The shedding of antlers also allows the deer to conserve energy and resources during the winter months when food is scarce and the deer’s body is working hard to stay warm.
The regeneration of deer antlers is an amazing process that is fueled by the deer’s dietary intake of minerals specifically calcium and phosphorus. Deer consume large amounts of these minerals during the spring and summer months when their antlers are growing. Once the antlers are shed the deer continue to consume high levels of minerals in order to regrow their antlers. The entire process from antler shedding to antler regeneration takes about 3-4 months.
While the function of antlers is still being studied they are thought to play a role in mate selection dominance hierarchies and defense. Antlers are used as weapons during fights between deer and the size and shape of antlers can be an indicator of a deer’s health and fitness. In mate selection bucks with large antlers are usually preferred by does as they are a sign of good health and genetic quality.
Deer antlers are an amazing example of the power of nature to regenerate and repair itself. The yearly cycle of shedding and regrowth is a testament to the deer’s ability to adapt to its environment and to the changing seasons.
Why do deer antlers fall off?
How does the process of antler shedding work?
What causes a deer’s antlers to fall off?
How often do deer shed their antlers?
When do deer shed their antlers?
How long does it take for a deer to regrow its antlers?
What do deer use their antlers for?
How do bucks grow their antlers?
How do does grow their antlers?
Do all deer have antlers?
How can you tell a buck from a doe?
What are velvet antlers?
How do antlers get their name?
Do all animals with antlers shed them?
What are some other uses for antlers?
