I use this all the time in the woods but I am a beginner at bird and animal language.
1. For example, the squirrels because they are territorial, are an early warning of approaching people. It gives you time to hide if you needed to. If you are scouting quietly through the woods, you can get the squirrels to stop making an alarm about you by crouching down and being still for a few moments. The squirrel will stop the alarm and in a few moments you can move without the squirrel continuing the alarm.
2. Circling birds are a sign of a big kill in the area or a dying animal. If you see it, it’s usually a good idea to take a look. We are omnivores scavengers after all, and we can easily live off the brains and marrow of dead animals, if we need to. Of course, cook any meat of dead animals and avoid the really gross stuff. (No, I’ve never eaten dead animals but I would if I needed to.)
3. If you hunt in the same area, hunters can build relationships with the local crows and ravens by feeding them waste parts of a kill. The “trained” crows and ravens will give an alarm call when prey are moving quietly through the forest. They want dinner too.
I don’t know that much about bird or animal language but Jon Young has studied the area all his life. I first learned about Jon Young through the Kamana Wilderness Course. (He’s not part of Kamana anymore but now runs 8 Shields which is a very expensive wilderness school.)
I thought the basic Kamana course was pretty good and for home schooled children and adults. I wasn’t so impressed by the later courses. The courses have gone from learning about wilderness to a more of a certification program. I guess, some people might like that.