A few weeks ago, I was watching 2 does about 130 yards downhill of me. I had setup at about 4:30 p.m. up above a nice wooded draw with the afternoon thermals still blowing uphill. After about 15 min of watching these relaxed deer, they suddenly turned and started trotting my way, back in general direction that they had come from (from my right). Then the snorts started. Still having the wind in my face, I figured that some swirling breeze put my scent onto them somehow -- it's happened before. Oh well.
20 minutes later, I'm still hearing occasional snorts. Wind still at my face.
20 min later, I hear hooves off to my right. They've moved uphill and much closer. Wind still at my face. Occasional snorts.
20 min of listening & I catch one of the does off to my right about 50-60 yards off and at the same level. Wind still at my face. The doe might move into my scent soon...
10 min go by and I'm thinking I'd like to watch the does and see what happens as they come into my scent. I slowly shift 90 degrees and watch the doe. Then I see a third deer in the mix. It's bigger than the others but its head ducks behind a tree so I wait. It steps out from the tree and I see it has antlers. Head turns and I see a fork. Just like that, I see my first legal buck in 3 years of hunting these mountains. Deer snorting nearly the whole time.
That was all just a long-winded story of how not all snorts are alarms. I don't know if it was the buck or the does that were snorting. There's a doe at a different spot that has a very high-pitched whistle when she snorts me off (definite alarm in her case). Makes me wonder if snorts can be broken down into a rough "language" like bird calls (alarm, feeding, coaxing, etc.). But I certainly need a lot more time in the woods to sort that out.