TORONTO, ON — Dr. Sheila R. Colla, an esteemed assistant professor in the Faculty of Environmental Studies at York University and a celebrated advocate for native bee conservation, passed away on Sunday, July 6, 2025, following a courageous, year-long struggle with a rare and aggressive form of thoracic cancer. She was 43 and passed peacefully, surrounded by the love she so generously shared with others.
A Scholar Who Brought Bees to Life
Dr. Colla was a leading voice in wildlife conservation and pollinator research. A classical ecologist, she authored more than 50 peer-reviewed journal articles, three peer-reviewed books, and multiple book chapters, anchoring her as a scholar whose work shaped environmental policies in both Canada and the U.S. Her influential research focused on native bumblebees and lesser-known pollinators, and her findings have been cited over 4,000 times—an affirmation of her formidable impact. Even environmental figures like Leonardo DiCaprio amplified her work, helping raise global awareness for native bee protection.
Sheila’s research extended beyond academia through collaboration with environmental NGOs and governmental agencies. Her advice informed land management decisions and protected pollinator habitats across urban and rural landscapes. Students and colleagues remember her as an inspiring mentor who consistently made complex ecology accessible to everyone—lay audiences, policymakers, and university students alike.
Passionate Educator and Community Activist
Visitors to one of her famed “bee walks” through Toronto’s Don Valley discovered her gift firsthand: a nervous beginner, guided gently to softly pet a bee, then walking away in delight, newfound respect blooming for native insects. This is emblematic of her ability to illuminate ecosystems’ interconnectedness: bees, land, climate, and people.
An active founding member of East Enders Against Racism, Sheila was a community builder. Whether hosting parenting discussion groups, aiding refugee families, teaching local science workshops, or singing in choir, she took action to foster inclusion, justice, and compassionate activism. Her strong voice leapfrogged academic circles.
Her gentle resolve, rooted in lived experience as a woman of color in a field dominated by others, pushed her onto equity committees for the Society for Conservation Biology. Even while facing inequitable barriers, she held space for voices often overlooked in conservation science.
A Sudden Diagnosis, a Global Community United
Hen diagnosed with an aggressive thoracic cancer in early 2024, Sheila fought with grace and strength. Her colleagues and community rallied—over 1,300 donations poured in to support emerging treatments and ease financial burdens. Through her illness, she held tight to her two children, supported by her husband Marc, a music teacher and artist, whose steadfast care allowed her to hold on with dignity and love.
Legacy of Science, Mentorship, and Compassion
Dr. Colla’s influence leaves an enduring legacy. Her work continues through her students and partners in environmental NGOs striving for sustainable land use and pollinator protection. Schools, government offices, and rural land-owners echo her message: respect native ecosystems; act on best science; embrace inclusivity in conservation.
Her mentorship extended well beyond academia—into labs, community gardens, daycare centers, and public parks—inviting curiosity about bees and embedding ecological stewardship in every walk.
Arrangements and Call to Action
A public visitation will be held Thursday, July 10 from 2–4 p.m. and 6–8 p.m. at Heritage Funeral Centre (50 Overlea Blvd). The funeral Mass will take place at St. Brigid’s Catholic Church (300 Wolverleigh Blvd) on Friday, July 11 at 9:30 a.m. The family requests donations be made in her name to Sheila’s GoFundMe or to environmental charities supporting bee conservation and health research.
In Her Own Words, and Through Her Impact
Dr. Sheila R. Colla
1982 – July 6, 2025
Scholar. Conservationist. Community builder. Mother. Mentor.
Her final legacy is written in ecosystems she helped heal, in people she inspired, and in the hum of native bees she brought into our awareness.
Carrying the Light Forward
In social and ecological networks alike, Sheila’s story travels as a reminder: one individual’s commitment to equity, science, and shared stewardship can shift systems and minds. Through her writing, her bee walks, her mentorship, her activism, and her courage, she helped rebuild the threads connecting us all—to each other, to the environment, and to the future we must protect. She will be deeply missed—and her work continues.