http://www.thegoosesmother.com/id6.html says that ducks imprint on species, not individual. Is this true as they grow up? So you can't teach them that kids are bad but you're okay, or a certain dog/cat is ok but any other is dangerous, etc? How do they follow their own mother out of a bunch in the wild? Is it like us where they can easily see the difference in each other because that is how their brains are wired, but for other species it is harder to find individual difference. For that last question, I mean that a lot of birds, often pelagic and colonial nesting ones, out of thousands of babies, a momma knows her baby and her baby knows her, which is often by sound, but they have brains that are attuned to the subtle differences, and we cannot for the life of us tell much of a difference between them because our brains arent suited for it.