A belief that many people share, I'm sure - if you find a baby bird on the ground, out of its nest..."Don't pick it up!" they tell you. The mother bird will smell your scent on the baby and will refuse to care for it.
I learned in college this is not true: most birds don't have a sense of smell at all, so no mother bird will reject her baby because it smells like a human. "Officials" just don't want people picking up baby birds!
A childhood belief about birds

others believed things like this
- I thought birds grew from bird seed. — Jen
- when I was little I was afraid of flies until mom told me they were baby birds!— Lisa
- I used to think House Finches were baby birds and they'd later grow into Robins or something— Mica
- on "highway to hell" i always thought it goes "baby see, baby do" instead of "hey satan, payin´ my dues"— Miss Understood
- That because Gerber Baby Food had a baby on it real babies were put in there. Thanks a lot cousin!— Nicole
- I used to believe that a baby shower was a tiny bathtub with a showerhead just for the baby.— Amy