Early on a spring morning, many of us wake to the sound of birds singing.
For most of our lives, it has simply been part of the background.
A robin calling from a hedge. Blackbirds singing at dawn. Wood pigeons cooing from nearby trees.
Yet scientists are increasingly interested in whether these familiar sounds may be influencing our brains in ways we never realised.
Recent research suggests that birdsong may help reduce anxiety, improve wellbeing and support mental recovery from the stresses of modern life.
And perhaps more importantly, birdsong appears to be just one part of a much bigger story about how nature affects the human brain.
Researchers have long known that many people find natural sounds calming.
However, recent studies suggest the effects may extend beyond simple enjoyment.
In a study published in Scientific Reports in 2022, researchers investigated how different sound environments affected mental wellbeing.
Participants listened either to birdsong or to traffic noise.
The results were striking.
Listening to birdsong was associated with reductions in anxiety and feelings of paranoia, while traffic noise tended to have the opposite effect.
Although researchers are still investigating the mechanisms involved, the findings suggest that natural sounds may influence how we feel in measurable ways.
In other words, birdsong may be doing more than simply providing a pleasant soundtrack to the day.
Scientists do not yet have all the answers.
However, researchers increasingly believe that birdsong may influence the brain through several different pathways, affecting attention, stress levels and emotional wellbeing.
One theory is that humans evolved in environments where birdsong was a common feature of safe and stable surroundings. A healthy natural environment often contains birds, and their songs may therefore act as subtle signals that conditions are calm and non-threatening.
This idea remains a hypothesis rather than an established fact.
Researchers are also investigating how birdsong and other natural sounds influence the brain.
One possibility is that birdsong forms part of a wider sensory environment that helps reduce activity in brain systems involved in stress and vigilance.
Studies have shown that spending time in natural environments can reduce activity in the amygdala, a region involved in processing stress and perceived threats.
Researchers have also found that exposure to nature may influence areas of the brain involved in rumination and emotional wellbeing, including the subgenual prefrontal cortex.
While scientists cannot yet say that birdsong alone is responsible for these effects, they increasingly believe that natural sounds form part of a wider sensory environment that helps the brain shift away from a state of constant alertness.
Birdsong may be one of the most recognisable sounds in nature, but researchers increasingly believe the benefits extend far beyond sound alone.
When we hear birds singing, we are often surrounded by other elements of the natural world: trees, greenery, fresh air, open skies and natural light.
Scientists are now investigating how these environments influence mood, stress levels, attention and brain function.
This broader field of research has produced some of the most intriguing findings about the relationship between nature and human health.
Over the past two decades, a growing body of evidence has suggested that spending time in natural environments may benefit both mental wellbeing and long-term brain health.
One of the most interesting discoveries involves a psychological process known as rumination.
Rumination refers to repeatedly dwelling on worries, problems or negative thoughts.
Most people experience it from time to time.
However, high levels of rumination are associated with anxiety, depression and poorer mental wellbeing.
In a widely cited study, researchers asked participants to spend 90 minutes either in a natural environment or in an urban setting.
Those who spent time in nature reported lower levels of rumination afterwards.
Brain scans revealed reduced activity in the subgenual prefrontal cortex, a region associated with repetitive negative thought patterns.
The findings suggest that natural environments may help quiet some of the mental processes involved in dwelling on worries and negative experiences.
This may be one reason many people feel mentally refreshed after spending time outdoors.
Modern life demands an enormous amount of attention.
Emails, traffic, work pressures, television, smartphones and social media all compete for our focus.
Psychologists refer to this as directed attention.
Like any resource, attention can become fatigued.
One influential explanation for nature’s benefits is known as Attention Restoration Theory.
The theory suggests that natural environments allow the brain to recover from mental fatigue.
Instead of demanding attention, nature gently holds it.
Researchers call this “soft fascination”.
Birdsong, moving leaves, flowing water and changing clouds capture our interest without requiring effort.
As a result, the brain may have an opportunity to rest and recover.
Several studies have found that spending time in natural environments can improve attention, concentration and mental recovery following periods of cognitive strain.
Perhaps the strongest evidence concerns stress.
Researchers have repeatedly found that spending time in natural environments can influence both psychological and physical markers of stress.
Studies have reported reductions in cortisol levels, blood pressure, heart rate and nervous system activity following exposure to green spaces and natural environments.
Brain imaging studies have also identified changes in regions involved in processing stress.
In a 2022 study published in Molecular Psychiatry, researchers found that a one-hour walk in nature reduced activity in the amygdala, a brain region that plays an important role in stress and emotional responses.
These findings are supported by larger reviews of the scientific literature, which consistently report links between nature exposure and lower stress levels.
This matters because chronic stress has been linked to poor sleep, depression, cardiovascular disease and cognitive decline.
Because stress and sleep are closely linked, researchers are also interested in whether regular exposure to natural environments may help support healthier sleep patterns.
Reducing stress is not simply about feeling calmer in the moment.
It may also help support long-term physical and mental health.
Depression is a complex medical condition influenced by many biological, psychological and social factors.
Nature exposure is not a replacement for professional medical treatment, and anyone experiencing symptoms of depression should seek appropriate support.
However, researchers are increasingly interested in whether natural environments may support mental wellbeing through several different pathways.
Reduced rumination, lower stress levels, greater opportunities for physical activity and increased social interaction may all contribute to better mental health.
While scientists cannot yet say that spending time in nature prevents or treats depression, the evidence suggests it may play a supportive role as part of a healthy lifestyle.
One obvious question is whether occasional exposure to nature is enough to make a difference.
Interestingly, one of the largest studies in this field suggests that relatively modest amounts may be beneficial.
Researchers analysed data from almost 20,000 adults in England and found that people who spent at least 120 minutes per week in nature were significantly more likely to report good health and wellbeing than those who spent no time in natural environments.
The benefits appeared whether the time was accumulated in one longer visit or spread across several shorter visits throughout the week.
For many people, this could include spending time in the garden, visiting a local park, walking through woodland, sitting outdoors with a book or exploring riverside and coastal paths.
The important factor appears to be regular contact with natural environments.
This recommendation is separate from NHS advice that adults should aim for at least 150 minutes of moderate-intensity physical activity each week. In practice, many people may be able to achieve both goals at the same time by spending part of their exercise time outdoors.
Scientists are increasingly interested in whether exposure to nature may support healthy brain ageing.
At present, there is no evidence that birdsong or green spaces directly prevent dementia.
However, many of the effects associated with spending time in nature overlap with factors known to influence long-term brain health.
Spending more time in natural environments has been linked with lower stress levels, better mental wellbeing, healthier blood pressure, improved sleep and greater physical activity.
Green spaces may also encourage social interaction, another factor associated with healthy ageing.
Researchers have also reported associations between greater exposure to green space and healthier brain structures involved in learning and memory.
One area receiving particular attention is the hippocampus, which plays a crucial role in memory formation and is affected early in Alzheimer’s disease.
While much remains to be understood, scientists are increasingly viewing nature as a potentially important component of a brain-healthy lifestyle.
When most of us think about brain health, we focus on familiar factors such as exercise, sleep and diet.
These remain extremely important.
But growing evidence suggests that the environments we spend time in may matter too.
The sounds of birds singing.
The sight of trees and greenery.
The opportunity to escape traffic, screens and constant demands on our attention.
Together, these experiences appear to influence the brain in ways that support mental wellbeing and resilience.
Scientists are still uncovering exactly how these effects work.
Yet one conclusion is becoming increasingly difficult to ignore:
Spending time in nature may be one of the simplest ways to support your mental wellbeing and potentially your long-term brain health.
1. Does birdsong really affect the brain?
Research suggests it can. Studies have found that listening to birdsong may reduce anxiety and improve mental wellbeing compared with exposure to traffic noise.
2. Which part of the brain is affected by nature?
Research has identified effects in several brain regions, including the subgenual prefrontal cortex, which is involved in rumination and emotional processing, the amygdala, which plays a role in stress responses, and the hippocampus, which is important for learning and memory.
3. Can spending time in nature help with depression?
Nature exposure is not a replacement for professional treatment. However, studies suggest that spending time in natural environments may support mental wellbeing through reduced stress, lower levels of rumination and increased opportunities for physical activity and social connection.
4. How much time should I spend in nature?
One large study found that spending at least 120 minutes per week in nature was associated with better health and wellbeing. This can be achieved through several shorter visits spread throughout the week.
5. Can nature prevent dementia?
Scientists cannot currently say that nature prevents dementia. However, many of the benefits associated with nature exposure, including lower stress levels, physical activity and improved cardiovascular health, are linked to healthier brain ageing.
This article is for general information only and is not intended to treat or diagnose medical conditions. If in doubt please check with your GP first.
Hammoud R, et al. Exposure to birdsong and traffic noise: Effects on mental wellbeing. Scientific Reports. 2022.
Bratman GN, Hamilton JP, Hahn KS, Daily GC, Gross JJ. Nature experience reduces rumination and subgenual prefrontal cortex activation. Proceedings of the National Academy of Sciences. 2015.
White MP, Alcock I, Grellier J, et al. Spending at least 120 minutes a week in nature is associated with good health and wellbeing. Scientific Reports. 2019.
Kaplan S. The restorative benefits of nature: Toward an integrative framework. Journal of Environmental Psychology. 1995.
Berman MG, Jonides J, Kaplan S. The cognitive benefits of interacting with nature. Psychological Science. 2008.
Twohig-Bennett C, Jones A. The health benefits of the great outdoors: A systematic review and meta-analysis of green space exposure and health outcomes. Environmental Research. 2018.
Sudimac S, Sale V, Kühn S. How nature nurtures: Amygdala activity decreases following a one-hour walk in nature. Molecular Psychiatry. 2022.
Frumkin H, Bratman GN, Breslow SJ, et al. Nature contact and human health: A research agenda. Environmental Health Perspectives. 2017.
NHS. Physical activity guidelines for adults.
National Institute on Aging. What happens to the brain in Alzheimer’s disease?
Mediterranean Diet Slashes Early Death Risk in Women by Nearly 25%, Study Finds
Bananas: Effective in Lowering Blood Pressure New Study Suggests
Shedding Just 5%: The Small Weight Loss with Massive Benefits
