Why Do Roosters Crow?

Michael Aranda goes to the barnyard to answer one of the most frequently asked questions about animals: Why do roosters crow? Short answer: Because they’re jerks. Longer answer: They’re jerks that tend to get noticed more than the other jerks around them. Learn more inside!
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Sources:
http://blogs.scientificamerican.com/anthropology-in-practice/2011/11/30/what-time-does-the-cock-crow/
http://www.smithsonianmag.com/science-nature/how-do-roosters-know-when-to-crow-3501338/
http://news.nationalgeographic.com.au/news/2013/03/130318-rooster-crow-circadian-clock-science/

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