I read that the reason we find birdsong so relaxing is because our nervous systems have been hard-wired over thousands of years to connect birdsong with safety. Birds won’t sing when there are predators around, so if there is birdsong in the air it means there is no imminent danger nearby. This connection to safety makes us feel relaxed and at peace. It is also thought that the specific frequencies of birdsong are calming for the brain – research conducted in 2022 found that the sound of birdsong can improve mood by reducing anxiety and depressive symptoms
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