By bertconcepts さん https://www.flickr.com/photos/bertconcepts/ [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0) or CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

This video was originally posted on the BBC.


The ducks eat pests and weeds that diminish agricultural productivity, but not the rice plants themselves.

Watch the video at: the BBC.