Pennsylvania State Bird Guide: History, Status, and the Scarlet Tanager Debate

Deep inside the northern hardwood tracts of Lycoming and Potter counties, the spring woods once throbbed with an acoustic vibration resembling a distant, sputtering tractor. That drumming display, produced when a male ruffed grouse (Bonasa umbellus) rapidly beats its wings against air while perched on a fallen mossy log, has defined Appalachian wildlife for centuries. Yet across Pennsylvania, that sonic signature is growing noticeably sparse.

A compounding combination of West Nile virus, mosquito proliferation in warming lowlands, and an acute deficit of young, thick forest cover has driven Pennsylvania’s official game bird into steep demographic decline. State wildlife agencies and forestry researchers have mobilized targeted intervention strategies, including specialized wetland treatments cataloged in an early pennlive.com Report tracking state-funded vector mapping. At the same time, conservationists and state legislators introduced proposals to designate the canopy-dwelling scarlet tanager (Piranga olivacea) as the official state migratory bird. The legislative debate has renewed public interest in how Pennsylvania manages its public lands, protects struggling avian populations, and reconciles traditional sporting heritage with modern ecological stewardship.

📌 Key Takeaways:

• Official Designation: The ruffed grouse remains Pennsylvania’s sole official state bird, designated by Act 234 in 1931 to honor the commonwealth’s sporting traditions and montane forests.
• The Dual Threat: Populations collapsed by more than 50% in vulnerable southern and low-elevation ranges following the arrival of West Nile virus, worsened by the aging of young, regenerating forests.
• Legislative Reality: Lawmakers proposed creating an official "State Migratory Bird" designation for the scarlet tanager to highlight interior forest preservation without revoking the grouse’s historic status.
• Active Management: The Pennsylvania Game Commission now relies on high-elevation forestry cuts above 1,500 feet, where cooler temperatures naturally suppress disease-carrying mosquitoes.

The Drumming Log: How Bonasa Umbellus Became an Appalachian Icon

The Pennsylvania General Assembly codified the ruffed grouse as the commonwealth's official avian symbol on June 22, 1931. The choice reflected an era when sportsmen formed the backbone of rural conservation policy. Nicknamed the "partridge" across New England and the rust-belt coal hills, Bonasa umbellus earned a reputation as one of the craftiest game birds in North America. Unlike ring-necked pheasants, which were imported from East Asia and sustained on stocked farmland preserves, the grouse was unapologetically wild. It refused domestication, thrived in rough mountain briars, and demanded exceptional marksmanship.

Its visual profile is tailored strictly for Appalachian camouflage. Measuring 16 to 19 inches with mottled brown, gray, and black plumage, the bird vanishes against decaying oak leaf litter. The neck features a dark, iridescent ruff of feathers that fans outward during territorial defense and courtship.

Behaviorally, the bird swings between extreme caution and baffling audacity. While most individuals flush into an explosive, zig-zagging escape flight the instant a human foot snaps a twig, others exhibit a known condition biologists refer to as the "tame grouse" phenomenon. In northern counties, individual grouse regularly approach loggers, trail hikers, and rural porch steps without fear, tilting their heads curiously at idling engines. Foresters in the Berkshire mountains and the Poconos have documented solitary birds tailing them along boundary lines for hours.

Yet the bird's cultural footprint rests almost entirely on the male's spring display. Rather than singing from an open perch like songbirds, the male stakes out an elevated "drumming log", usually an expansive, decaying hemlock or red oak fallen decades earlier. Gripping the bark, he fans his tail and sweeps his wings forward and upward. The motion compresses air pockets against his body, generating a sub-audible sonic boom that carries up to a quarter of a mile through dense vegetation.

West Nile Virus and the Vanishing Early Successional Forest

Between 2001 and 2018, annual flush rates monitored by Pennsylvania hunters and agency staff plunged drastically. For decades, biologists attributed regional oscillations to regular 10-year predator-prey cycles. By 2014, lab necropsies conducted by the Pennsylvania Game Commission (PGC) revealed a far more lethal driver: West Nile virus (WNV), transmitted by Culex mosquitoes.

When infected, ruffed grouse suffer acute myocarditis, severe heart tissue necrosis, and neurological failure. Mortality rates among young grouse chicks exposed to the virus in controlled lab trials soared past 70%. Pennsylvania's warming summer temperatures expanded mosquito breeding seasons, allowing the insects to infiltrate valley bottoms and mid-elevation woodlands that historically remained too cold for high vector densities.

Compounding this epidemiological blow is an acute landscape deficit: the statewide loss of early successional forest habitat. Grouse are obligate users of young forest, stands characterized by dense saplings, thick aspen suckers, blackberry thickets, and scrub oak that emerge 5 to 20 years after a major disturbance. These tangled stands provide two vital services:

• Abundant seasonal food sources, including catkins, berries, and high-protein invertebrate blooms for newly hatched broods.
• Inpenetrable overhead cover that shields ground-nesting birds from northern goshawks, red-tailed hawks, and coyotes.

Throughout the mid-twentieth century, widespread timber harvesting, charcoal production, and agricultural clearing created a mosaic of regenerating brush. Today, Pennsylvania’s public and private forests have matured simultaneously into vast, closed-canopy oak-hickory stands. The dense brush is gone, replaced by open park-like forest floors where adult grouse and vulnerable chicks are easily spotted by predators and exposed to disease-carrying insects.

Grouse Versus Tanager: Comparing Pennsylvania’s Flagship Woodland Species

Debates over the state bird took on political urgency when lawmakers in Harrisburg introduced legislation to formally recognize the scarlet tanager. The proposal drew immediate comparisons between the ecology, status, and management needs of both birds.

The comparison illuminates an ecological divide. The ruffed grouse requires aggressive, dynamic forest disturbance, commercial timbering, shelterwood cuts, and controlled brush clearing, to survive. The scarlet tanager demands the exact opposite: unbroken, unfragmented, ancient core forest. Where a newly logged clear-cut revives a ruffed grouse brood, it fragments the interior canopy required by breeding tanagers, exposing them to nest predators. Managing for both species requires landscape-level balancing across the state's 2.2 million acres of state forests and 1.5 million acres of State Game Lands.

The Legislative Push: Designating a State Migratory Bird

The legislative campaign to add the scarlet tanager to Pennsylvania’s statutory roster was not intended to cancel the ruffed grouse. Introduced by state lawmakers responding to avian conservation initiatives, the bill sought to create an entirely new category: the State Migratory Bird.

Supporters built their argument around ecological geography. Pennsylvania holds a uniquely high global responsibility for the scarlet tanager. During peak summer breeding, the state's sprawling northern hardwood and oak ecosystems support an estimated 8% to 10% of the species’ total global breeding population. Few other songbirds tie Pennsylvania so directly to the international biodiversity corridor running between the Appalachian spine and the western Amazon basin.

The bill ignited sharp debate across Harrisburg corridors:

1. The Traditional Sporting Coalition: Hunting federations and sportsman-funded conservation groups pushed back against any language that could undermine the ruffed grouse's prominence. They noted that hunting license fees, Pittman-Robertson excise taxes, and game management budgets had funded state land acquisition for nearly a century, directly preserving the very woodlands tanagers occupy.
2. The Non-Game and Ecological Advocacy Groups: Audubon chapters and ornithological clubs championed the measure as overdue recognition for non-game species. They argued that expanding state symbols beyond historic game animals creates broader civic engagement, mobilizing non-hunting birdwatchers and nature photographers around forest defense.
3. The Compromise Outcome: Lawmakers recognized that both species symbolize distinct, equally vital stages of Appalachian ecology. The debate ensured the grouse retains its foundational 1931 title while elevating public awareness of the deep-forest habitat needs of Neotropical migrants passing through the Susquehanna and Delaware river valleys.

Targeted Forestry and Mosquito Control in the High-Canopy Era

Faced with steep population declines, the Pennsylvania Game Commission fundamentally rewrote its Grouse Management Plan. Instead of relying on passive habitat protection, agency biologists developed a targeted spatial restoration framework.

The centerpiece of this strategy is the "Grouse Priority Area Siting Tool" (G-PAST). Using fine-scale geographic information systems (GIS), agency scientists mapped habitat parcels with specific environmental criteria: elevations exceeding 1,500 to 2,000 feet, low ambient temperatures, well-drained soils, and distance from major mosquito breeding wetlands. Because Culex mosquitoes struggle to complete their life cycle in cold, high-elevation climates, these mountain plateaus act as natural climate and disease refuges.

Within these secure microclimates, wildlife foresters deploy aggressive early successional management:

• Patch Cuts and Aspen Regeneration: Clear-cutting small, distributed 5- to 20-acre parcels allows dormant root systems of quaking and bigtooth aspen to sprout thousands of dense young stems per acre, erecting vertical visual barriers that foil raptors.
• Controlled Browse and Fencing: White-tailed deer populations across Pennsylvania heavily over-browse regenerating hardwoods. Forestry teams build high-tensile woven wire fences around harvest units to allow young saplings to outgrow deer reach.
• Mosquito Vector Mitigation: State agencies coordinate targeted biological larvicides (such as Bacillus thuringiensis israelensis, or BTI) in low-lying access roads, blocked culverts, and artificial tire ruts near high-priority public woodlands, eradicating mosquito reservoirs before adults emerge in June and July.

Hunter harvest regulations adjusted in parallel. The Game Commission closed the traditional late-winter grouse hunting season statewide in 2017 to protect surviving breeding hens carrying hard-won antibodies. The late season remains tightly restricted, reserving hunting pressure strictly for early autumn windows when populations are at their seasonal peak.

Frequently Asked Questions (FAQ)

Why did Pennsylvania choose the ruffed grouse as its state bird?
The Pennsylvania General Assembly approved the ruffed grouse via Act 234 on June 22, 1931. State leaders selected the bird to honor the commonwealth’s rugged mountain wildlands, its long-standing rural hunting heritage, and the game bird’s historic abundance throughout the Appalachian oak and hemlock ridges.

Is Pennsylvania replacing the ruffed grouse with the scarlet tanager?
No. Legislative bills concerning the scarlet tanager proposed adding it as the official "State Migratory Bird," not replacing the ruffed grouse. The grouse remains the official, permanent commonwealth state bird, while the tanager proposal highlights the preservation of mature, unfragmented canopy forests used by Neotropical migrants.

How did West Nile virus impact Pennsylvania’s grouse population?
Introduced to North America in 1999, West Nile virus proved lethal to ruffed grouse, causing fatal heart inflammation and neurological damage. The disease wiped out grouse populations across lowland counties and river valleys where warm water permits intensive breeding of *Culex* mosquitoes. Today, viable populations survive primarily on high-elevation plateaus above 1,500 feet.

How does a male ruffed grouse make its famous drumming noise?
The drumming sound is entirely mechanical, not vocal. Perched on a log, the male grouse rotates its wings forward and upward at blinding speed. The forward stroke compresses air against its breast feathers, breaking the sound barrier and producing a series of deep, percussive sonic thuds designed to attract females and warn competing males.

Where can you reliably see or hear ruffed grouse in Pennsylvania today?
The most dependable areas are found across the Northern Tier and Allegheny High Plateau, particularly in the Allegheny National Forest, Sproul State Forest, and State Game Lands throughout Potter, Tioga, Elk, and Cameron counties. Early morning visits in April and May along high-elevation logging roads offer the best opportunity to hear the bird's distinctive drumming.

The Future of Pennsylvania's Forest Heritage

The survival of Pennsylvania's state bird rests on a paradigm shift in how public lands are managed. For decades, wildland preservation was equated with complete non-intervention, allowing forests to age without disturbance. The collapse of the ruffed grouse revealed the flaws of that hands-off approach. Without active management, balanced timber harvest cycles, and climate-informed vector buffers, specialized early successional species vanish.

The parallel push to champion the scarlet tanager demonstrates that Pennsylvania's forests cannot be treated as a monoculture. A healthy mountain landscape requires structural contrast: dense, chaotic clear-cuts directly adjoining unbroken stands of ancient, high-canopy oaks. Balancing those competing demands will determine whether the drummer on the mossy log continues to echo through Pennsylvania's ridges, or slips into the quiet archive of lost wild wonders.