It is a very simple question, the woods and animals are " one" when something is happening in an area you can bet all the animals will be cautious(in that area). At one time humans could read the woods, some still can, some learn how. I' m not saying a deer won' t go in an area where squirels, crow, or what ever is raisin heck, but when they do go to that area they will be alittle more alert. Different sounds mean different things, some times when you are sitting in the woods just watch and listen to the way an animal acts towards different situations. Take squirels watch(and listen) them when they feel threatened, then watch them when they are after food, playing, etc... Watch how fast they send a message when a big ole owl comes around. One more thing to watch with a squirel is its tail. All animals seem to communicate with each other, in one way or another. Just my observation...........