3B: "Mom, is that You?"
first, while the babies are still blind, they can't see their mother
at all. They remain very still in the nest when she's not there
so predators won't notice them.
Q: How do baby hummers know when their mother has returned
(Answer under photo.)
can feel the wind from her wings on their skin, and they can hear
the little "mew" call she makes to them.