What Key whistle for Madden's "Homesteaders"

Whistle
1

Can anyone tell me what key whistle Joanie Madden uses for “Homesteaders” on the Song of the Irish Flute 2? This really is a beautiful piece. I have an A, but it goes lower and I’m not proficient enough to tell if it goes to a G or slightly lower still. No G whistle (yet) to test it out.

Any help?

2

The whistle is in G, yes. The tune is in C.

3

Thanks! Now all I have to do is wait for the Low G I’ve got on the way.