Hear a male howler monkey roar
A male red howler monkey proves his vocal stamina. In howler monkeys, expanded vocal tracts make for louder males with smaller testes, researchers find.
Read more: http://ow.ly/TJvkC
Video: La Senda Verde Animal Refuge, Bolivia
Watch video Hear a male howler monkey roar online, duration hours minute second in high quality that is uploaded to the channel Science News 22 October 2015. Share the link to the video on social media so that your subscribers and friends will also watch this video. This video clip has been viewed 505,731 times and liked it 3.1 thousand visitors.
