If you see a hooter on stage that is black, it is homemade. It is a spinoff of the hooter that I use and came up with a long time ago. the sreamers are anything from woodduck calls, hawk calls, wood pecker calls or owl hooter guts that have been modified. the nicer looking ones are James Harrison hooters, the ones with black tape around them are homemade. but only a handfull have figure out how to make the black ones the right way.
I build and sell a screamer for guys that want one.