I think any of us who came from certain parts of the country where we had people who really did watch these signs are more likely to take them as just a part of life. I know, coming from the Lancaster County Amish Country there are so many that we think are funny, but even the farmer's almanac goes along with some of them.
For example, the date on the calendar that it is on when we have the first snow that covers the grass, that is how many snows we will have that year.
Of course there is the one many cultures look at is the color of the wooley caterpillar in the fall to determine the severity of the winter.
When the barn swallows leave us sometime in August, we usually begin to prepare the barn and equipment for Fall and Winter. (that has alot to do with their droppings too.
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Being a bird watcher I use the birds to tell me the weather as well as the time of year (their arrival and departure), as well as their eating habits to help me judge the weather. Some are already beginning to gather (flock) but not ready to leave yet.
I am not sure about the turkey buzzards, what do they show you. We have them all year round and I never noticed any difference with their habits...very interested in that.
Are these the type things you are talking about.???. This is a great thread topic. I love to hear what other people have to say.