My mother used to prevent me from eating types of berries that were inedible to humans by telling me that they were "bird-berries, not people-berries." I beleived until the age of fifteen that "bird-berry" was the proper name of the plant.
A childhood belief about plants

others believed things like this
- I used to believe that the school rabbit liked the red berries that grew in the hedge. But then he died.— Charlotte
- My mother convinced all of us kids in our family that the large rhubarb in the garden was a Man-Eating Plant. — H.Miller
- until the age of 6 i didnt know bird had feet.Anon
- i used to believe if a cat ate a bird the cat would eventually GROW WINGS!— nightmare
- I once for some reason thought a Mantis was a bird, instead of a bug...— Laurie J.
- I thought birds grew from bird seed. — Jen