You can't "call a Cow", they way you would call a bull. Just doesn't work that way. Saying that, a cow that has lost here calf can usually be attracted by the sound of a calf in distress but only if she lost the calf within the last day, maybe two. She will stay in the general area, usually within a quarter mile.
If someone kills a calf moose and removes it from the area, Momma will come to "investigate" a distress call.
A little caution here too, Momma moose may not be in the best of mood either, she's comming to assist her young who is calling for help. She can get pretty bitchy and those hooves can be deadly.
Those calls are actual moose. Practice them. The better you get,the better the chance of success. Personaly, I prefer a birch bark horn, 18-22 inches long, it reverberates the sounds better.
Let me start off by saying that I am a scaredy cat.
For someone that spent 3 years in 82nd Airborne jumping out of all manner of military aircraft, my friends find this ludicrous - but... it is what it is!
Climbing stand? Yep, still scared - put me up 15' and that is about it.
Ladder stands? I am better in these - but still cautious.
Chain on stands? Used to love them, now they terrify me.
I was once ridiculed for putting chain on stands waaaay too high - some of my friends...