Myth: A mother bird will reject its baby if it’s been touched by a human
Reality: Most birds have a poor sense of smell and wouldn’t know the difference. It’s also not wise to touch baby birds because an angry mama bird might fly in your face or peck at your head, Overall, mother birds are much more loyal to their babies than this myth suggests.
Source: https://thebestschools.org/magazine/25-popular-science-myths-debunked/