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Published on Apr 1, 2010
Canopy expert Justine Evans goes in search of red howler monkeys but instead comes across a group of animals with a fearsome reputation - vampire vats nesting in a cave deep in the forest. Visit http://www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel here: http://www.youtube.com/bbcearth