In other words, get ready to grab your binoculars, says a group of brain researchers in Canada.
Much of the common scientific conversation around preserving strong memory and cognition centers on continually learning new subjects and skills. One lay-friendly way of explaining this is that picking up fresh knowledge helps stimulate the formation of new neural pathways, which can help keep the brain healthy, engaged, and—so to speak—young.
But a new study examined brain and memory from perhaps a less-common angle. Five radiology, psychiatry, and psychology researchers at Canada’s University of Calgary and University of Toronto asked whether having invested a lot of time in a single interest affects the brain. Maybe another way of asking this is: if you’ve spent years focused in a single domain of expertise—say, practicing a certain career, or having played a certain instrument since you were young—can that longstanding development benefit the brain, too?
To study this, they examined bird-watchers of a wide age range: 29 skilled birders, ages 24 to 75, who were compared to an equal number of novices of the same age match and gender as the experienced group. This wide age range essentially helped the team examine whether positive effects compound in the brain throughout the adult lifespan, and whether these effects vary between genders.
The scientists chose birding as the activity of choice because it’s a rich real-world skill that calls for high-level perception (visual discrimination to detect subtle species differences), attention (noticing bird characteristics quickly), and memory (having familiarity with many species). Birding is also a domain where expertise develops over years of dedicated practice, and can be picked up by anyone of any age. This created a prime opportunity to study how expertise interacts with aging.
For the study, published February 2026 in the Journal of Neuroscience, the team employed two types of brain imaging to examine differences in brain structure and activity during bird identification. They also put participants through a bird ID-ing accuracy test.
They came away with several main findings, starting with structural brain variations. The brains of experienced bird-watchers showed clear structural modifications in certain regions associated with attention and visual perception—not in random areas, but specifically in the regions heavily tapped for discriminating fine visual details.
The same regions that changed structurally were the ones that functionally activated during hard identification tasks. This may be the study’s most compelling contribution: the brain regions that looked different between the experts versus the non-experts were the same regions that lit up for the seasoned group during the toughest bird-identifying tasks. This strongly suggests that years of working these parts of the brain permanently influence the physical characteristics of these regions.
Also, the more experienced group showed resistance to age-related decline in the key areas of the brain that were required for their tasks.
One message here may be that no matter your age, if you’ve been curious about birding, it may be time to purchase your first field guide and get out there this season. National Audubon Society data in 2025 suggested that interest in birding is at its height, with 96 million Americans, or about one-third of the population, having spent a reported $107 billion dollars on the hobby in 2022.
Arguably, venturing into any wholesome new interest could prompt similar effects.
Another point may simply be to stay engaged with life to help keep your brain sharp. If you’re not the outdoorsy type but had a career you loved, consider taking on a client here or there; or stick with any hobby you’ve enjoyed over the years. You don’t have to be a novice to nurture your mind.
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