Rainforest duets are a 'battle of the sexes'

[Andrew Taylor <>]

"Female birds faced with competition from an unpaired female rival can
jam the songs of their own mates, who then respond by singing
more complex songs to avoid interference, Oxford University scientists
have discovered.

The findings, reported in Current Biology, are based on a study of the
Peruvian warbling-antbird (Hypocnemis peruviana), and provide the first
evidence that signal jamming is used within long-term partnerships."

More at:
http://www.ox.ac.uk/media/news_stories/2009/090313_2.html