Not sure if this has been posted here before. I found this on the web. Interesting video and audio of 2 immature cougars calling to each other. Chirping away like birds....
http://www.huntingfootage.com/data/520/1201curious_cats-thumb.jpg
Enjoy.
http://www.huntingfootage.com/data/520/1201curious_cats-thumb.jpg
Enjoy.