Male Songbirds Need Daily Vocal Practice to Woo Females

Birds might sing in the morning because they need a vocal workout
https://www.scientificamerican.com/article/male-songbirds-need-daily-vocal-practice-to-woo-females/
Male Songbirds Need Daily Vocal Practice to Woo Females

Birds might sing in the morning because they need a vocal workout
https://www.scientificamerican.com/article/male-songbirds-need-daily-vocal-practice-to-woo-females/
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