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Biology

How Light Pollution Disrupts Circadian Rhythms in Urban Songbirds

Quick fact

Urban songbirds exposed to artificial light at night begin their dawn chorus up to 1-2 hours earlier than their rural counterparts, and they produce more melatonin-suppressing light exposure, leading to disrupted sleep and altered reproductive physiology.

Why this is interesting

Every morning, city birds start singing before the sun rises. But why are they up so early, and what is that extra light telling their bodies?

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How Light Pollution Disrupts Circadian Rhythms in Urban Songbirds

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