These sites have examples of the calling sequences

courtesy of
SPRIG'S WATERFOWL
Mike Baalman
veteran hunter/caller		 courtesy of
CRACKLIN' MALLARD CALLS Chester Mathias
call maker		 courtesy of
CARLSON CHAMPIONSHIP CALL COMPANY
Jim James
1996 World Champion Duck Caller
courtesy of
TIMBER MALLARD CALLS
Patrick Lenderman
call maker		   courtesy of
BIG MUDDY WATERFOWL COMPANY