Predators, Predation & Why We Manage Foundations

Predation on Game & Ground-Nesters

Lesson 2 of 37 · Module 1, lesson 2

Assumes the Hunting Primer. New here? Start there first.

Your objective

By the end, you'll be able to explain how mesopredators affect key game species in the SC Piedmont and accurately describe what the research does and does not support about predation as a population driver.

Concept ~8 min

You’ve seen the velvet-covered fawns on trail cameras in June. By August, some of those fawns are gone. Not to hunting season — hunting season hasn’t opened. Where do they go, and does the mesopredator guild play a real role? The answer matters before you invest money and effort in a predator management program. This lesson is the honest research summary.

Quick recall

From The SC Piedmont Predator Guild — which two species are described as the leading fawn predators among the Piedmont mesopredator guild?

Coyote and bobcat Gray fox and raccoon Bobcat and raccoon

Show answer

Correct: Coyote and bobcat — Right. Both coyote and bobcat are documented fawn predators in the Southeast. Coyotes are typically the leading cause of fawn mortality where they are present.
Not quite: Gray fox and raccoon — Raccoon are major nest predators for ground-nesting birds, but they are not documented as significant fawn predators. Coyote and bobcat are the primary fawn hunters.
Not quite: Bobcat and raccoon — Bobcat does take fawns, but raccoon is not a significant fawn predator. Coyote and bobcat are the pair to remember for fawn predation.

Deer fawns: the research record

White-tailed deer fawns are vulnerable during their first weeks of life. They are born small, scentless early on (they hide rather than run), and dependent on their doe for weeks. That window of vulnerability is when predation matters most.

Studies in the Southeast have documented coyotes as the leading cause of fawn mortality on most sites where coyotes are established. Fawn mortality attributed to predation ranges widely — from about 18% at some Virginia sites to 72% in some South Carolina studies — reflecting differences in coyote density, habitat, deer population condition, and research methods.

Bobcats also take fawns, and a Florida study confirmed bobcat, fox, and alligator as fawn predators (alligators obviously not relevant in the Piedmont). Gray fox appear in fawn-predation records but at substantially lower rates than coyote or bobcat.

The why Why do fawn predation rates vary so much between studies?

The wide range (18–72%) reflects real biological variation plus methodological differences. Studies differ in their GPS-collar sample sizes, how long they track fawns, how they confirm cause of death, and what the baseline deer and predator densities are. A site with low deer density and high coyote pressure will show higher predation rates than a site with abundant deer and lower coyote numbers. Read any predation figure as a range, not a single universal number.

Turkey and ground-nesting bird research

Wild turkey nests are vulnerable to predation throughout the 28-day incubation period and during the brood-rearing phase when poults are flightless. A South Carolina Savannah River study found turkey in the diets of all three focal mesopredators:

Gray fox — turkey present in 14% of gray fox diet samples (the highest rate among the three).
Coyote — turkey present in 9% of coyote diet samples.
Bobcat — turkey present in 5% of bobcat diet samples.

These figures are for spring diets during turkey nesting and brood-rearing periods, when turkey are most available to predators.

For ground-nesting bird nest failure specifically (quail, turkey nests), the major culprits are different from fawn predators. Multiple studies identify raccoon, opossum, and striped skunk as the species responsible for the majority of nest depredation events — not foxes. Raccoons are documented using a consistent technique: carrying eggs a few meters from the nest, then biting into one end.

Coyote — primary fawn predator Bobcat — secondary fawn predator Raccoon — primary nest predator Opossum — secondary nest predator

Diagram (not a photo). The predator-prey picture for fawns and nests is not the same. Coyote leads fawn predation; raccoon leads nest depredation. Management has to match the actual predator, not a generic 'predator' category.

Rabbits and small mammals

Rabbits (Sylvilagus floridanus, the Eastern cottontail) are a primary prey item for every predator in the Piedmont guild. High predator densities can suppress rabbit populations, and rabbit populations are a good indirect indicator of overall mesopredator pressure in a habitat. Gray fox, bobcat, and coyote all take rabbits regularly.

Edge case What the research does NOT support

Several claims circulate in hunting culture that the science does not back up clearly:

Bobwhite quail decline caused primarily by mesopredators. Research consistently shows that habitat loss — the loss of the brushy field edges, native bunch-grass cover, and food-plot diversity quail need — is the primary driver of quail decline across the Southeast. Predation is a real compounding stress but not the root cause.
Killing coyotes on a single property “solves” a deer population problem. Compensatory rebound (covered in the next lesson) means intensive, sustained removal on a landscape scale is required to affect deer recruitment, not a seasonal cull on one farm.
Fox removal protects turkey nests. Since raccoon and opossum dominate nest failure, a trap line targeting only fox may miss the actual problem. Know which predators you’re managing before you build the program.

Knowledge check

According to the research, which predators are responsible for most ground-nesting bird NEST FAILURES in the Southeast?

Raccoon, opossum, and striped skunk Gray fox and bobcat Coyote and bobcat

Show answer

Correct: Raccoon, opossum, and striped skunk — Correct. Multiple studies point to raccoon as the leading nest depredator (documented technique: carry egg away and bite into one end). Opossum and skunk follow. Foxes are secondary nest predators.
Not quite: Gray fox and bobcat — Foxes and bobcats do take bird nests, but research consistently identifies raccoon, opossum, and skunk as the dominant nest predators for quail and turkey. This matters: a trap line targeting only fox may miss the primary problem.
Not quite: Coyote and bobcat — Coyotes and bobcats are primary FAWN predators, but they are not the leading nest depredators for ground-nesting birds. That role belongs to raccoon, opossum, and skunk.

Knowledge check

SC studies have documented fawn predation rates of 18%–72%. What does this wide range most accurately tell you?

Predation rates are site-specific and depend on local predator density, deer density, and habitat — not a single universal number The research is too inconsistent to be useful for management decisions You should expect to lose 72% of your fawns every year

Show answer

Correct: Predation rates are site-specific and depend on local predator density, deer density, and habitat — not a single universal number — Exactly right. The range reflects genuine biological variation plus differences in study methods. Use the range as a planning context, not a prediction — and combine predator management with habitat and harvest data from your specific property.
Not quite: The research is too inconsistent to be useful for management decisions — The range is wide, but the research is still useful: it establishes that predation is a real factor, identifies coyote as the primary predator on most sites, and sets expectations for what management can and cannot achieve.
Not quite: You should expect to lose 72% of your fawns every year — The 72% figure is from one high-predator-pressure SC study, not a universal expectation. Most Piedmont sites fall in a lower range. Use your local trail camera data and fawn-to-doe ratios to assess your specific situation.

Take it to the woods

Assess your property's predation context before building a management plan

0/5

Pull your June–July trail camera data and estimate your fawn-to-doe ratio. A ratio below 0.5 fawns per doe in summer may indicate heavy predation pressure.
If you have quail or turkey habitat, look for failed nests (empty shells outside the nest, disturbed nesting cover) and try to identify the predator from egg-handling sign.
List the predator species you have trail camera evidence of on the property — this determines where your management focus should go.
Be honest about habitat quality: is there adequate fawning cover, quail nesting structure, and food? Predation is a compounding factor, not always the root cause. Habitat improvement and predator management together outperform either alone.
Note your current fawn recruitment and nest success as a baseline before reading the next lesson on management rationale.

Sources

Gould et al. 2023, “Assessing springtime vertebrate prey of sympatric mesopredators in the southeastern United States using metabarcoding analysis,” PLOS One: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0293270
Mississippi State University Deer Ecology Lab, “Predation and Deer in the Southeast”: https://www.msudeer.msstate.edu/predation-and-deer-in-the-southeast.php
Hughes 2005, “The Impacts of Predation on Wild Turkeys,” Proceedings of the National Wild Turkey Symposium: https://wildlife.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/j.2328-5540.2005.tb00300.x
Harris et al. 2023, “Mesopredator predation risk limits northern bobwhite nesting habitat,” Ecosphere: https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecs2.4516
Wildlife Management Institute, “Impacts of Predators on Northern Bobwhites in the Southeast”: https://wildlifemanagement.institute/sites/default/files/2016-09/7-Impacts_of_Predators.pdf
White et al. 2023, “White-tailed deer fawn survival and landscape characteristics” (Southern Appalachians), PLOS One: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10470973/
Predation on white-tailed deer fawns by bobcats, foxes, and alligators (Predator Assessment): https://www.researchgate.net/publication/271585818_Predation_on_White-tailed_Deer_Fawns_by_Bobcats_Foxes_and_Alligators_Predator_Assessment

If you remember nothing else

Coyotes are the primary predator of white-tailed deer fawns in the Southeast; fawn mortality to coyotes has been measured at 18–72% in different studies.
Bobcats and gray foxes also take fawns and turkey poults, though at lower rates than coyotes.
Ground-nesting bird failure (quail, turkey nests) is dominated by raccoon, opossum, and skunk — not primarily foxes.
Research supports predation as a meaningful factor in fawn and poult recruitment, but habitat quality, weather, and adult survival are also critical drivers.
Predator removal alone rarely solves a population problem — it works best as one part of a combined habitat-and-harvest strategy.

How ready do you feel?

How ready are you to explain the predator-prey relationships for deer fawns and ground-nesting birds without overstating or understating the research?

Before you go — a quick look back

Distributed practice: one fast recall from an earlier lesson keeps it from fading.

Quick recall

From The SC Piedmont Predator Guild — which predator in the Piedmont guild is NOT actually a predator at all, and why does it still appear in a predator-trapping track?

Show me the answer

Show answer

Correct: Show me the answer — Beaver. Beaver are herbivores, not predators. They appear in this track because they are managed through trapping and their dam-building causes agricultural and timber damage that triggers depredation permits.

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