Here is a web-site to practice too.

http://www.jesseshuntingpage.com/wingbone-call.html

Just open the sounds.

to help keep that call int eh same place each time go get a small 'o'-ring from a hardware store. Slip it over the end and slide tot he place that allows you to make the same sound each time. I also use these 'o' rings to help me keep it in my mouth hands free and to possible give that one last cluck.

JW