Thermal Drone Survey Reveals Devastating 78% Fawn Mortality on High-Predator Property

February 10, 2026 aerial assessment confirms catastrophic recruitment failure that leaves herd vulnerable to EHD collapse

On February 10, 2026, Longspur Tracking and Outfitting conducted a comprehensive thermal drone survey at midday on our 600-acre study property in West Virginia. The results confirm what many deer managers across the state are experiencing but may not fully recognize: predator populations are decimating fawn recruitment at levels that don't just threaten long-term herd viability—they create the perfect conditions for complete population collapse during the next EHD outbreak.

The Numbers Don't Lie: Verified Population Density

Our thermal imaging flight identified 54 total deer on the 600-acre property (0.9375 square miles), breaking down as follows:

Mature Does (1.5+ years): 24 does = 25.6 per square mile

Mature Bucks (1.5+ years): 11 bucks = 11.7 per square mile (all have shed antlers)

Female Fawns (7+ months): 14 fawns = 14.9 per square mile

Button Buck Fawns (7+ months): 5 fawns = 5.3 per square mile

Total Deer Density: 57.6 deer per square mile

Total Fawn Recruitment: 20.3 fawns per square mile

The Recruitment Crisis: A Ticking Time Bomb

This property has biological capacity to support 85 fawns under optimal conditions. We confirmed only 19 surviving fawns—a devastating 78% fawn mortality rate.

With 24 mature does present, average recruitment sits below one fawn per doe. In a healthy deer population without significant predation pressure, we would expect to see 1.5 to 2.0 fawns per doe surviving to this age class.

But here's what should terrify every deer manager looking at these numbers: This herd is catastrophically age-skewed toward mature animals.

Of the 54 deer on this property, 35 are mature animals (1.5 years or older) while only 19 are fawns. That's a 65% mature to 35% young deer ratio—the exact opposite of what you need to survive an EHD outbreak.

Why Age Structure Matters: The EHD Vulnerability Factor

EHD (Epizootic Hemorrhagic Disease) disproportionately kills older deer. Mature bucks and does have significantly higher mortality rates during outbreaks than fawns and yearlings. Young deer demonstrate much greater resistance to the virus.

Here's the nightmare scenario this property—and many others across West Virginia—are facing:

If EHD hits this herd in summer 2026, those 35 mature deer could experience 70-90% mortality. With 78% of this year's fawn crop already lost to predation, there simply aren't enough young animals to rebuild the population.

We witnessed this exact pattern play out in western West Virginia and eastern Ohio during summer 2025. In the hardest-hit drainage systems, entire herds collapsed because they entered the outbreak with poor recruitment from previous years. Adult deer died en masse, and there weren't enough fawns and yearlings to sustain the population.

Some properties are now down to nothing but scattered fawns—and those are being systematically eliminated by the same predator populations that caused the recruitment failure in the first place.

The devastation doesn't end when the virus runs its course. It continues through the following winter and spring as predators focus on the only deer left: vulnerable young animals with no adult herd structure for protection.

The Predator-Disease Death Spiral

What we're documenting on this study property is the early stage of a death spiral that has already destroyed deer populations across multiple counties:

Stage 1: High predator populations suppress fawn recruitment (we're here—78% loss)

Stage 2: Herd becomes age-skewed toward mature animals vulnerable to EHD

Stage 3: EHD outbreak kills 70-90% of mature deer

Stage 4: Remaining fawns face concentrated predation with no adult deer to buffer pressure

Stage 5: Complete population collapse

Properties that experienced heavy EHD mortality in 2025 and are now showing poor recruitment in 2026 are in Stage 4 or 5. They may not recover for a decade or more without massive intervention.

Trail Camera Comparison: Why Aerial Verification Matters

Our initial trail camera surveys using AI-assisted individual deer identification had identified only 4 fawns on this property—suggesting a 95% loss rate. The thermal flight revealed 15 additional fawns the cameras missed, demonstrating why aerial verification is essential for accurate population assessment.

Trail cameras remain invaluable for ongoing monitoring. As we progress through spring and antlers begin development, we'll use camera networks to age-class bucks and track recruitment patterns. However, for baseline population data and comprehensive herd health assessment, thermal drone surveys provide accuracy that ground-based methods simply cannot match.

Understanding your true age structure isn't academic—it's survival planning.

Predator Population: The Primary Limiting Factor

The thermal flight also confirmed two active black bears on the property. Combined with our previous surveys documenting one alpha coyote pair with four pups and four mature bobcats, the predator load on this 600 acres is staggering.

To date, we have removed one juvenile female coyote from the property. One adult black bear was also found dead (gut shot) prior to the flight. Systematic predator removal will continue throughout winter and spring as we work to reduce pressure on next year's fawn crop.

Every predator removed now is an investment in 2026 recruitment—and potentially the difference between herd survival and collapse if EHD strikes again.

A Bright Spot: Exceptional Body Condition Despite Crisis

Despite the recruitment catastrophe, every deer observed during the thermal survey showed excellent body condition. This is direct result of our ongoing P&R Whitetail Supreme feed and mineral program, which has maintained herd health through hunting season and into winter.

This matters enormously for EHD resilience. Well-nourished deer have stronger immune responses and better survival rates during disease outbreaks. The mature deer on this property are in optimal condition to resist infection—but only if they're still alive when breeding season arrives.

However, body condition alone cannot overcome the biological reality facing these deer over the next 65 days, nor can it fix the age structure crisis created by predation.

The Critical Window: February 10 - April 15

Right now, West Virginia deer managers face the most dangerous period of the year for herd mortality.

Coming off a record mast crop, winter supplies are starting to run low. Natural browse quality declines significantly through late winter. Deer that survived hunting season and early winter are now entering a period of maximum nutritional stress—precisely when does are in late gestation and bucks are recovering from the rut.

Winter mortality from February through mid-April can erase an entire year's management efforts if nutrition is not addressed immediately.

For properties already showing poor recruitment and age-skewed populations, losing mature does to winter malnutrition is catastrophic. Those does represent the breeding stock needed to rebuild fawn numbers in 2026—and the older animals most likely to die if EHD returns.

Does need high-quality protein and minerals to support fawn development during the final trimester. Bucks need nutritional support to begin antler growth cycles. Fawns—already stressed by predation pressure—need supplementation to reach yearling status with adequate body mass.

Every mature doe that dies between now and April 15 is one less deer producing fawns to balance the age structure. Every fawn that dies is one less EHD-resistant animal available if the virus returns.

If you are not currently running a feeding and mineral program, you are gambling with your herd's survival—not just its quality.

Buck Management Reality Check: Can This Herd Support Quality Harvest?

One of the most difficult conversations in deer management is the gap between harvest goals and biological reality. Many properties in West Virginia operate under informal or formal buck management guidelines—often allowing harvest of bucks meeting minimum criteria such as 8 points or 18 inches inside spread, with annual harvest targets of 4-6 mature bucks per property.

The question we must ask based on this thermal survey data: Can a herd with 5 button buck fawns recruiting annually sustain harvest of 6 mature bucks per year?

The answer is unequivocal: No.

The Recruitment Math

Let's work through the numbers:

Current Button Buck Recruitment:

• 5 button bucks survived from this year's fawn crop
• 19 total fawns means button bucks represent 26% of recruitment
• 24 mature does produced 5 button bucks = 0.21 button bucks per doe

Sustainable Harvest Calculations:

To harvest 6 bucks annually at 2.5+ years of age (the minimum age most bucks reach 8 points or 18" spread), you need a steady pipeline of young bucks entering the population.

Assuming 75% survival from button buck to 2.5-year-old status (accounting for hunter error, predation, vehicle strikes, and disease), you need approximately 8 button bucks recruiting annually to produce 6 harvestable bucks two years later.

With current recruitment of only 5 button bucks, this property can sustainably harvest 3-4 mature bucks maximumunder optimal conditions. Harvesting 6 bucks per year at current recruitment rates means you're removing bucks faster than the population can replace them.

The trajectory is clear: continued harvest at 6 bucks annually will result in progressively younger age structure among bucks, declining antler quality, and eventually failure to meet even basic 8-point criteria as 1.5-year-old bucks become the dominant harvestable class.

What Recruitment Level Is Actually Needed?

To sustainably support harvest of 6 mature bucks annually, this property needs dramatic improvement in button buck recruitment:

Target: 10-12 button bucks surviving to 7 months of age

This means:

• Doubling current button buck recruitment from 5 to 10-12 annually
• Achieving overall fawn recruitment of 35-40 fawns (assuming 50/50 sex ratio at birth and equal survival rates)
• Reducing fawn mortality from 78% to approximately 50-55%

Breaking it down further:

With 24 mature does, target recruitment requires:

• 1.5+ fawns per doe surviving to 7 months
• 0.75+ button bucks per doe
• 0.75+ doe fawns per doe

These numbers are achievable—they represent normal recruitment in areas without excessive predation. But reaching them from current baseline requires sustained, aggressive predator management combined with excellent nutrition and habitat quality.

Interim Harvest Strategies: Managing During Recovery

Properties committed to multi-year recovery plans face a difficult decision: What harvest strategy protects buck age structure while recruitment improves?

Conservative Approach (Years 1-2):

• Limit buck harvest to 2-3 mature bucks annually
• Implement minimum 3.5-year age structure for harvest (typically 9+ points, 20"+ spread)
• This allows maximum buck retention while fawn recruitment improves
• Painful short-term sacrifice, but preserves breeding structure and genetic diversity

Moderate Approach (Years 2-3):

• Increase to 4-5 buck harvest as button buck recruitment climbs above 7-8 annually
• Maintain 2.5-year minimum age structure (8 points, 18" spread)
• Monitor buck:doe ratios through trail cameras and thermal surveys
• Adjust annually based on verified button buck numbers

Target Achievement (Year 4+):

• Move to 6-buck harvest only after consistent recruitment of 10+ button bucks for 2+ consecutive years
• Continue thermal surveys to verify population structure
• Predator management becomes maintenance rather than crisis response

Critical Warning: Properties that experienced significant EHD mortality in 2025 AND show poor fawn recruitment cannot implement any of these strategies without first addressing both crises. You may need to completely close buck harvest for 1-2 seasons while the herd rebuilds baseline numbers.

The 3.5-Year Advantage for Recruitment and Rut Intensity

The conventional wisdom says you protect young bucks to "let them grow bigger antlers." That's true, but it misses the far more important benefit: allowing bucks to reach 3.5+ years creates the breeding competition and rut intensity that directly improves fawn recruitment.

Here's how it works.

The Breeding Competition Factor

When a property maintains multiple mature bucks (3.5+ years) competing for breeding rights, something critical happens: does get bred during their first estrus cycle.

With only young bucks (1.5-2.5 years) doing most of the breeding:

• Dominant does may not accept young bucks immediately
• Does cycle multiple times (21-day intervals) before conception
• Fawn drop stretches across 6-8 weeks (late May through early July)
• Predators have extended time to systematically hunt vulnerable newborn fawns

With multiple mature bucks (3.5+ years) competing aggressively:

• Intense rut activity brings does into estrus more synchronously
• Dominant does breed during first cycle due to mature buck presence
• Breeding window compresses to 2-3 weeks
• Fawn drop concentrates into 3-4 week window (late May to mid-June)

The Predator Saturation Effect

This is where recruitment improvement happens.

A coyote pair with pups can kill 2-3 fawns per week during May-June. If fawns drop over 8 weeks, that's 16-24 fawns killed per coyote family. On our study property with multiple coyote families and bobcats, an extended fawn drop means predators systematically eliminate the majority of fawns.

But when fawn drop compresses into 3-4 weeks:

• Predators can only kill 6-12 fawns per family before fawns are large/mobile enough to escape
• The sheer number of fawns on the ground at once overwhelms predator hunting capacity
• Recruitment jumps from 20-30% to 40-50% with no change in predator numbers

This is predator saturation - the same principle that drives mast production in oaks. Produce enough acorns at once, and predators can't possibly eat them all.

The Doe Population Management Connection

This strategy only works if doe density is properly managed. Here's why:

Scenario 1: Too Many Does, Young Buck Structure

• 40 does breeding over 8-week window with 1.5-2.5 year bucks
• Fawn drop: 60 fawns spread across May-July
• Predator impact: High (extended vulnerability window)
• Result: 20-30% recruitment despite high doe numbers

Scenario 2: Managed Does, Mature Buck Structure

• 24 does breeding over 2-3 week window with 3.5+ year bucks
• Fawn drop: 36 fawns concentrated in late May/early June
• Predator impact: Moderate (saturation effect kicks in)
• Result: 40-50% recruitment from synchronized drop

The math is clear: You're better off with 24 does breeding synchronously than 40 does breeding across extended timeframes.

Proper doe management means:

• Maintaining 15-25 does per square mile (not 35-40+)
• Culling older, less productive does (8+ years) that breed late or have poor conception rates
• Prioritizing doe body condition through nutrition programs
• Understanding that doe QUALITY matters more than doe QUANTITY for recruitment

Implementation on This Property

Our study property currently has:

• 24 mature does (appropriate density)
• 11 mature bucks (good buck:doe ratio)
• But only 2-3 bucks at 3.5+ years

Recommended approach:

Years 1-2:

• Implement 3.5-year minimum buck harvest threshold
• Limit buck harvest to 2 mature bucks maximum
• This allows 8-9 bucks to reach 3.5+ years over next 2-3 seasons
• Maintain doe harvest to keep population at 20-25 does
• Continue aggressive predator management

Years 3-4:

• Buck age structure shifts: 5-6 bucks now 3.5+ years
• Rut intensity increases dramatically with mature buck competition
• Breeding window compresses naturally
• Monitor fawn drop timing through trail cameras
• Expect recruitment improvement to 35-45% even with predators present

Years 5+:

• Sustained recruitment of 12-15 fawns per year (vs. current 5)
• Can increase buck harvest to 3-4 mature bucks annually
• Rut intensity and synchronized breeding become self-sustaining
• Property demonstrates resilience to both predation and EHD

The EHD Insurance Policy

As a bonus, this strategy provides critical EHD protection - keeping 6-8 younger bucks alive means disease can't eliminate your entire breeding population. But the real win is you're not just surviving the next outbreak, you're building a herd that produces enough fawns to recover quickly afterward.

Properties that lost 80% of their mature deer to EHD in 2025 but had synchronized fawn drops in 2026 are already showing recovery. Properties with poor fawn recruitment and extended breeding windows are still in crisis mode.

The Bottom Line

Protecting bucks to 3.5+ years isn't about antler inches - it's about creating the rut intensity and breeding synchronization that drives concentrated fawn drops. When combined with proper doe density management (20-25 does per square mile) and continued predator control, this approach can improve recruitment by 15-20 percentage points even before predator numbers decline significantly.

You're not sacrificing hunting opportunity - you're investing in the biological mechanisms that ensure you'll have bucks to hunt for the next decade.

What Deer Managers Must Do Now

The data from this thermal survey points to three critical action items for West Virginia deer managers who want their herds to survive the next 5 years:

1. Implement Late Winter and Spring Mineral Programs Immediately

Do not wait until green-up to start mineral supplementation. Does in late gestation require mineral resources now. Bucks beginning antler growth in March need calcium, phosphorus, and trace minerals available before browse quality improves.

Longspur recommends and uses P&R Whitetail Supreme because it delivers results we can measure. The body condition of deer on our study property—despite catastrophic predation—proves that quality nutrition makes the difference between herd survival and herd collapse.

Nutritional programs serve two purposes: They maximize the productivity of your current breeding stock, and they improve disease resistance in the event of another EHD outbreak. Both are essential given the age structure crisis most properties are facing.

2. Plan Spring Timber Management and Invasive Species Control

As we move toward spring, properties need actionable plans for:

• Timber stand improvement (TSI) to increase browse production and mast-producing tree health
• Invasive species removal that competes with native browse and mast species
• Hinge cutting and edge feathering to create early successional habitat where fawns can hide from predators

These habitat improvements accomplish multiple goals simultaneously. Better browse and mast production supports doe body condition and milk production, improving fawn survival rates. Dense escape cover gives fawns protection from predators during the critical first 8 weeks of life.

Properties that invest in timber management now will see measurable recruitment improvements within 2-3 years, even with predator pressure. More importantly, they'll have the age structure diversity needed to survive the next EHD outbreak.

3. Continue Aggressive Predator Removal Through Spring

This is non-negotiable if you want to fix age structure problems.

Coyotes, bobcats, and bears removed now mean fewer predators targeting fawns during the May-June drop. Every female coyote killed before denning season potentially saves 4-6 pups that would mature into fawn-killing machines by next winter.

But predator control is about more than just next year's fawn crop. It's about breaking the death spiral before EHD returns.

Properties with 70-80% fawn mortality cannot rebuild age structure while predator populations remain high. You need multiple consecutive years of strong recruitment (1.5+ fawns per doe) to balance the age classes. That's impossible with the predator densities we're documenting across West Virginia.

Predator control is not a one-time event. It requires systematic, sustained effort. But the payoff—measured in fawns surviving to yearling status and herds that can withstand disease outbreaks—is the difference between having deer to hunt in 2030 and having empty properties.

The Path Forward: Multi-Year Commitment Required

Here's the hard truth: You cannot fix this problem in one season.

Properties showing 70-80% fawn mortality and age-skewed populations need a minimum 3-year management plan addressing:

• Year 1: Aggressive predator control, nutrition programs to maximize doe productivity, habitat assessment
• Year 2: Continued predator management, timber work to improve fawn survival habitat, recruitment monitoring
• Year 3: Evaluation of age structure improvement, adjustment of harvest strategies to protect rebuilding

Properties that also experienced significant EHD mortality may need 5+ years of intensive management to return to healthy population levels and age structure.

The question isn't whether this is worth the investment. The question is whether you want to have a deer herd at all.

Professional Management: Let Longspur Help

Longspur Tracking and Outfitting offers comprehensive property management programs designed specifically for West Virginia's unique challenges:

• Thermal drone population surveys with accurate density calculations, sex ratio analysis, and age structure assessment
• Trail camera programs using AI-assisted individual identification for ongoing monitoring
• Custom management plans addressing nutrition, habitat, and predator control with realistic timelines
• Timber management consulting for browse and mast production that improves fawn survival
• Mineral and feed program design tailored to your property's soil and deer density

This isn't theory. This is data-driven management producing measurable results on properties facing the same challenges you are.

Call Longspur today at 304-439-1659 to schedule your property assessment.

We'll conduct thermal surveys, analyze your current herd structure and age composition, and develop an actionable plan to improve recruitment and build EHD-resilient populations before the next outbreak.

Study Continues: Follow Our Progress

This thermal flight represents the first verified baseline data in our multi-year study on fawn recruitment and EHD resilience. As we continue systematic predator removal, monitor body condition through late winter, and track 2026 fawn recruitment, we'll share results with West Virginia's deer management community.

Follow our YouTube channel and Facebook page for updates on:

• Predator removal operations and techniques
• Spring fawning season recruitment monitoring
• Age structure changes and population recovery metrics
• Antler growth progression and buck age-class development
• Timber management and habitat improvement projects
• EHD outbreak responses and herd resilience factors

Our goal is simple: provide West Virginia deer managers with the knowledge and tools needed to build resilient herds capable of withstanding disease, predation, and environmental challenges.

The Bottom Line

The 78% fawn mortality documented on this property isn't just a recruitment problem—it's a survival crisis. Age-skewed herds dominated by mature animals are sitting ducks for the next EHD outbreak.

Western West Virginia and eastern Ohio showed us what happens when poor recruitment meets disease. Entire herds disappeared. Properties that produced quality bucks for decades are now reduced to scattered fawns fighting for survival against concentrated predation.

You have a 65-day window—February 10 through April 15—to keep your mature does alive and productive through late winter stress. You have a 90-day window before fawning season to reduce predator populations. You have a 6-month window before potential EHD outbreaks to improve herd health and age structure.

The data is clear. The timeline is unforgiving. The choice is yours.

Either commit to intensive management now, or accept that your property may join the growing list of deer-depleted landscapes across western West Virginia.

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Longspur Tracking and Outfitting - America's largest wounded game recovery operation and your partner in comprehensive deer management. Call 304-439-1659 or find us on Facebook to discuss your property's needs. Don't wait until summer to address February's crisis.