Sound pollution
1 sound
Continue streight, and take the second path right. Sound and light pollution in the urban environments disrupts the circadian rhythm of blackbirds, altering their natural sleep–wake cycles and hormonal regulation. Artificial light at night causes them to begin their dawn chorus earlier, while constant background noise forces males to sing at higher amplitudes and frequencies to be heard over urban sounds. This increased vocal effort demands additional energy expenditure, leading to elevated stress levels and reduced physical condition over time. Consequently, these physiological strains contribute to shorter lifespans and reduced reproductive success among urban-dwelling blackbirds. Turn left on the circle and left at the bar.
