whistle

I was pondering the idea of memes last night, which led me to language and the various experiments to teach apes to speak or understand language, when I suddenly wondered (as one does)- Has anyone ever tried to teach apes to whistle? Chimps have at least as much lip muscle control as humans...

I heard a hunter-type guy whistling at his hound dog this morning. Repeatedly. Loud. Could have woke the neighborhood. He had his camoflouge vest on. And I sat in my van watching him..the way he rounded up the dog. This got me thinking: This goes way back with me, when I was in school. There...