How to build a floating nest.
 

You can find plans for building floating habitats for wildlife at the website
below:

Floating Wildlife Habitats website:

http://members.aol.com/Tjacmc/index.html
http://hometown.aol.com/Tjacmc/index.html
http://members.aol.com/floatinghabitats/index.html
http://hometown.aol.com/floatinghabitats/index.html