The short answer: no
This is the single most damaging myth in wildlife rescue. Mother mammals and birds do not abandon their young because a person touched them. Squirrel mothers routinely carry fallen babies back up the tree by the scruff. Rabbit mothers return to a nest a child has handled. Songbird parents keep feeding a nestling you put back.
Every year this myth kills animals. Not because touching hurts them, but because people who touched a baby then feel they cannot put it back, so a healthy animal that should have gone back to its mother ends up in a box instead.
Where the myth comes from
Most mammals and birds rely far more on location, timing and their own young’s calls than on scent. Birds in particular have a limited sense of smell, so "the mother will smell you on it" was never true for them at all. The idea seems to have spread as well-meant advice to keep children from disturbing nests, and then hardened into folklore.
What actually matters
Reuniting is almost always better than rehabilitation. A wild mother is better at raising her young than any human is, and the survival odds are not close. So the real questions are not about your scent.
Is the animal injured, bleeding, cold, or covered in flies or fly eggs?
Has it been in a cat’s or dog’s mouth? Cat and dog saliva is a medical emergency even with no visible wound.
Is it actually orphaned, or just young and out on its own? Many species leave young alone for long stretches by design.
Has the mother had a genuine chance to come back, meaning quiet, no people, no pets, during daylight?
If the answer to the first two is no, put it back and give her a few hours. If it is yes, it needs a rehabilitator.
What to do instead of worrying about scent
Warm the animal if it is cold, using a covered warm water bottle or a heating pad on low under half a box. Keep it quiet and away from pets and children. Do not feed it anything at all, including water.
Then get a photo and text it to a rehabber. In West Tennessee, text us at 901-340-6534. A photo settles in ten seconds what twenty minutes of description cannot.
The exceptions worth knowing
A mother that is dead, obviously injured, or has not returned after a full day is a different case. And rabbits look abandoned even when they are not. The mother visits only about twice a day, at dawn and dusk, and that is completely normal.
Who is answering this
Out of the Woods Wildlife Rescue & Rehab is a wildlife rehabilitation nonprofit in Memphis, Tennessee, permitted by the Tennessee Wildlife Resources Agency and serving Shelby County and West Tennessee. We take these calls year round and there is never a charge to ask. Text 901-340-6534.