I said it recently somehere that deer are curious critters and will investigate strange odors, like cigarette smoke.
I'm reminded of the old apocrypha about deer hunting with a Mosin Nagant. You stick an apple on that looooong bayonet and poke it out of the bushes you're hiding in.
When a deer comes by to eat the apple, BLAM!
Bear in mind I am merely describing a possibly illegal act, not advocating one. Gotta keep the forum rules in mind.
Also, one can take advantage of antelopes' curiosity:
http://www.outdoorlife.com/articles/hunting/2014/04/essential-outdoor-skill-flag-antelopeI wasn't hunting, but I had this happen to me once. I was camped on the Grasslands and one morning I raised the usual Stars and Stripes on my camper, then went back inside for breakfast. I spotted a herd of antelope about a mile away through the window, and was amazed that within the hour, they were less than 100 yards away, looking at my camper.
Heck, even the Indians knew about this trick:
https://images.fineartamerica.com/images/artworkimages/mediumlarge/1/flagging-antelope-charles-m-russell.jpg(That's a copyrighted image, referenced here under the so-called fair use Doctrine for educational purposes. Gotta watch the forum rules.)
I'm sure many of you have had the experience of large herbivores grazing peacefully gradually coming up and crowding around you, sniffing and poking.
Terry