A
ntlers are fast-growing, costly-to-produce
appendages that are shed and regrown
annually. Like most structures in nature,
antler development in most deer species
is genetically coded to grow perfectly symmetrical on
both the right and left sides. A deer's antlers reflect an
individual's health and condition, with size and shape
influenced by genetics, age and nutrition.
Interestingly, one notable exception to perfect antler
symmetry in the deer family is found in caribou, also
known as reindeer. Unlike all other common deer species,
their antlers display noticeable asymmetry with the
left antler typically larger than the right, with features
such as the shovel, or brow tine, showing the largest
variation in size.
While antler shape is primarily due to genetic factors,
antler size is more directly related to nutrition and age.
Asymmetry occurs in all deer species at varying degrees,
often due to stressors experienced prior to and during antler
development. These stressors may be env ironmental
or biological, including climate, pollutants, pathogens,
nutrition, disease, predation, competition, parasites and
insects. These stressors can negatively impact health
which redirects energy away from normal growth.
Abnormal antler growth on the left likely resulted
from genetics or a limb injury, while the deformed
antler on the right was caused by damage to the
pedicle or skull plate.
August-September 2026 • Nebraskaland 53
