Steve Bartylla
5 year old buck +
I think deer have memories and cognitive thought.
.... Simply watch deer react to opening morning of the gun season.
This is something I've pondered hard over the last few months. I don't pretend that it's not possible I'm wrong, but here's a brief summation of my beliefs.
Every study I've read says deer simply do not have the ability to use rational thought. They read and react. At the same time, there is absolutely no doubt in my mind that you can literally train deer through positive and negative reinforcement. I could bore you all with a laundry list of examples. Lastly, I've come to believe that deer have extremely short memories of the more mundane things that occur in their lives, but incidents they view as more traumatic stick with them longer.
A perfect example occurred this fall. I'd been ninjaing into stands with deer out more then ever before, but a doe and fawn were 20 yards in front of the tree I was going to hunt and there was just no way. So, I decided to walk out into the plot and nudge them off, instead of spook them half way up the tree. I got 15 yards from her when she lifted her head (blind corner and windy day). 1.5 and 2.5 year old bucks were feeding 30 yards away from the doe and fawn. They kept looking from me to the doe and back, taking their cue from the older doe. She just flicked her tail and kept staring at me. I even went so far as to, in a calm voice, tell her to get out of here already so I could hunt. She wouldn't spook. So, I climbed up into the stand and hunted, with the 4 of them watching me climb the tree and going back to feeding for another 20 mins, before eventually leaving.
About 2 hours later, the doe and fawn returned (both easily recognizable). I was sloppy in filming them, as they both had watched me climb into the tree, glanced up at me numerous times and had dismissed me as harmless. She spotted me and did a head bop and foot stomp for 10ish mins. She'd obviously forgotten completely about watching me climb the tree, setup all my camera gear and slip into hunting mode, just 2 hours before. At the same time, I'm sure all of us have had does bust us from stands, only to be staring a hole into us every other time they come out from there on., for the rest of season and occasionally even following seasons. The only thing I can conclude is that if the experience seems traumatic, they seem to be able to hang on to that "memory." If it's more mundane, no big deal, it is gone from their memories within hours.
By the way, that occurred in the center of a large chunk that I have tightly controlled pressure on for 5 years running now. Way more of the deer on that ground than not would have bolted (though I have had a few experiences very similar to that there, they are more the exception than the rule). I just trained one of them (the old doe) to not see hunters as a threat, as she'd most certainly not had a single negative encounter with humans in at least the previous 5 years. She didn't realize she was supposed to be scared, but couldn't figure out what the blob was doing up in the tree a couple hours later.