Expert birdwatchers show measurable structural and functional differences in their brains compared to novices, according to new research that suggests the hobby may build cognitive reserve and slow brain ageing.
The study, published in The Journal of Neuroscience, was led by Erik Wing at York University in Canada. His team scanned the brains of 48 hobbyist birders, split evenly between experts and novices, while participants completed a visual bird identification task. Participants ranged from 22 to 79 years old, with both groups matched for sex, age and education.
What the Brain Scans Revealed
Each participant viewed a bird image for under four seconds, then attempted to identify it from four options showing different species roughly ten seconds later. The task ran 72 times, using 18 species total, six local and 12 non-local. “All the birds are really similar,” Wing noted. “We intentionally picked highly confusable bird species.”
Expert birders correctly identified 83 percent of local species and 61 percent of non-local ones. Novices identified 44 percent of both groups.
When identifying unfamiliar, non-local birds, three brain regions showed increased activity in experts but not in novices: the bilateral prefrontal cortex, bilateral intraparietal sulcus and right occipitotemporal cortex. These areas govern object identification, visual processing, attention and working memory.
Beyond activity patterns, these regions also appeared more structurally complex and organised in expert birders. “It speaks to the wide range of cognitive processes that are involved in birding,” Wing said.
The Ageing Question
Both groups showed the expected age-related decline in structural brain complexity. The decline, though, was less pronounced in expert birders, pointing toward a potential protective effect against brain ageing.
Robert Zatorre at McGill University in Canada, who was not involved in the research, described the findings as adding weight to a long-debated concept. “It suggests that maintaining brain activity with some specialised abilities is also linked to reduced effects of ageing,” he said. “That is an idea that has been out there for quite a long time, but it’s sort of disputed. This paper adds another bit of evidence in favour of the concept.”
The researchers draw a parallel to other forms of expertise. Professional musicians develop structural changes in auditory brain regions. Athletes show adaptations in motor areas. Birdwatching, Wing argues, may follow the same neuroplastic logic, just applied to a different cluster of skills.
Not Just Birds
Wing is careful to point out that the cognitive benefits likely have nothing to do with birds specifically. Any activity that consistently engages attention, memory and sensory integration could, in theory, produce similar brain changes. “If you had another domain that recruited all of the same types of processes, we would expect to see sort of comparable changes there,” he said.
The study carries a significant limitation. It is cross-sectional, capturing one moment in time rather than tracking individuals over years. People drawn to birdwatching may already have brain structures that predispose them to the hobby. Lifestyle factors common among birders could also contribute. Establishing causality would require repeated brain scans across months or years, Wing acknowledges.
For now, the findings add to growing evidence that cognitively demanding hobbies can leave a physical mark on the brain, one that may matter as people age.
Photo by Sreenivas on Unsplash
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