This is true. One has to spend a lot of time day and night in the woods to know these things.
I recall a story about the little blue people who tend their gardens at night.
I believe it´s a Cherokee story about a perfect garden being found in the deep woods. There was never anyone around in the daytime so one night the people waited and hid. They saw these little blue people come out of the ground. They tended the garden and returned back under the ground.

I know a lady who is an ordained minister. She has a place up in the mountains in North Carolina. She takes people to see the faries that live there. These little people are only a few inches tall and come out when you go there. They are very sociable and curious little guys.

Personally I have seen little "people" type creatures in the woods who instantly change like a camillian when you spot them. They blend in very well and suddenly with nature. I just call them nature spirits. I have shown them to others and told them what to look for. They have been left totally shocked at what they saw.