When acorns start hitting the ground, deer often change where they spend time. For landowners and hunters, the acorn crop can provide useful clues about deer movement and habitat use. Research has found that deer increase their use of areas producing acorns during mast fall, making productive oak stands important areas to monitor in fall.
A Heavy Acorn Crop Can Shift Deer Movement
A strong acorn crop can draw deer into oak-dominated areas. Research has documented increased deer use of acorn-producing areas when mast is available. A part of the property that sees limited activity earlier in the year can become more important once acorns begin dropping. Pay attention to which oak stands are actually producing rather than simply counting the number of oak trees.
Not All Acorns Are the Same
Oak species produce acorns with different characteristics. White oak acorns generally contain less tannin and are more palatable to deer. Red oak acorns typically contain more tannins, making them more bitter, but they can become an important food source when preferred foods are limited.
White oak acorns mature in one growing season, while red oak acorns take two. This means the timing and availability of mast can vary between oak species.
Look for Deer Sign Under Productive Oaks
The most useful information comes from combining the acorn crop with deer sign. Look for:
- Fresh tracks
- Trails beneath or near oak trees
- Droppings
- Disturbed leaves where deer are feeding
- Rubs and scrapes nearby
- Trail camera activity
- Browsing around surrounding vegetation
A few heavily producing trees can be more important at a particular time than a larger stand producing little mast.
Acorn Production Changes From Year to Year
Oak production can vary significantly between years because of weather, tree characteristics and other factors. When acorns are scarce, deer may spend more time using other available food sources, including agricultural fields, crop residue, browse, soft mast or food plots. That means deer movement can look very different from one fall to the next.
Watch How the Food Source Changes
Acorns do not remain available indefinitely. Wildlife consumes them, weather moves them and different oak species drop them at different times. Check productive areas throughout the fall to see where food remains and whether deer activity is shifting. Landowners can also keep track of which oak species produce consistently. Over time, that information can help with decisions about timber management and wildlife habitat.
The Bigger Picture
Acorns are only one part of deer habitat. The most useful information comes from looking at food alongside bedding cover, travel routes and other deer sign. This fall, pay attention to which oak trees are producing and what is happening around them. The acorn crop can give you a better understanding of how deer are using your property.