What age can you tell gender by voice?

[BarbaraNH]

I have to agree with R2elk. Guinea hens can call out nonstop, possibly close to 24 hours a day. They don't even seem to take a breath. LOL We have wild turkeys around here, and there is one turkey hen that is always calling, but I don't find her call as irritating (or as loud).

 

[red horse ranch]

Remember the song 'All Night Long, all night, all night.......'
That's what it sounded like here the last few nights.
Had to shut the window last night because of the guinea hens.