In a dramatic intervention to combat an alarming moth infestation, Vancouver’s Stanley Park is undergoing significant tree removals, sparking debate among environmentalists and local residents. Over the past three years, nearly a third of the park’s 600,000 trees have succumbed to the Hemlock looper moth, inciting city officials to take action to ensure public safety and manage wildfire risks in this cherished green space.
The Moth Infestation and Its Aftermath
High above the forest floor, an arborist meticulously removes the dead crown of a hemlock tree. The sound of the chainsaw slices through the serene atmosphere of one of Canada’s most beloved urban parks. The trees, once vibrant, now stand as grey sentinels, victims of a moth infestation that has devastated vast portions of the park since 2020.
The Hemlock looper moth, native to the region, began a cyclical outbreak that has wrought havoc on the park’s ecosystem. The larvae of these moths feasted on the needles of the towering trees, leading to the demise of approximately 160,000 trees by early 2023. As the city moves to mitigate the dangers posed by these dead trees, a contentious debate unfolds over the methods employed.
Public Safety and Environmental Concerns
City officials assert that the removal of dead trees is crucial to safeguarding the millions of visitors who flock to Stanley Park each year. Joe McLeod, Vancouver’s associate director of urban forestry, emphasises the risks associated with dead trees, particularly in high winds when branches may snap and fall without warning. Moreover, the accumulation of dead wood poses a significant fire hazard, particularly in the context of increasingly dry conditions exacerbated by climate change.
However, this approach has not gone unchallenged. A vocal faction of park advocates argues that the removals amount to unnecessary logging in a nationally significant area. Michael Robert Caditz, founder of the Stanley Park Preservation Society, has been at the forefront of this resistance. His group, which formed in response to the tree removals, contends that the narrative surrounding the moth infestation and the need for tree cutting is exaggerated.
The Legal Battle and Expert Opinions
Caditz’s opposition has led to legal challenges against the city’s tree removal programme, citing concerns over environmental impacts and the processes by which contracts for the work were awarded. In December 2025, a B.C. Supreme Court judge ruled against one of Caditz’s claims, affirming that the city acted reasonably in its management decisions.
Ecologist Rhonda Millikin has joined Caditz in critiquing the city’s approach, arguing that thinning the forest could inadvertently increase wildfire risks by allowing for drier conditions. Yet, city officials, backed by wildfire ecologist Bruce Blackwell, maintain that while thinning may affect moisture levels, it ultimately reduces the fuel available for fires, thus protecting the park from potentially catastrophic blazes.
The Future of Stanley Park
As the removals continue, the city aims to strike a balance between ecological preservation and public safety. Approximately 11,000 trees have been removed thus far, with plans to plant 50,000 new seedlings, including Douglas firs and Sitka spruces, to rejuvenate the forest. This reforestation effort seeks to ensure that Stanley Park will continue to thrive in the long term.
Despite the ongoing debates, Blackwell recognises the emotional weight of these decisions. “People are deeply connected to trees,” he reflects, acknowledging the complexities of managing a cherished urban forest. The park, once a wild expanse, has been shaped by nearly two centuries of human intervention, and the path forward will require both understanding and adaptation.
Why it Matters
The unfolding situation in Stanley Park highlights a critical tension in urban forestry: the need to protect public safety and manage ecological health amid the pressures of climate change. As cities grapple with increasing wildfire risks and the impacts of invasive species, the decisions made in places like Stanley Park can serve as a microcosm for broader environmental challenges faced globally. Balancing human safety with ecological integrity is no small feat, and how Vancouver navigates this dilemma could set precedents for urban parks worldwide.
