Day 3B: "Mom, Is That You?" At 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 with food? (Answer under photo.) A. They can feel the wind from her wings on their skin, and they can hear the little "mew" call she makes to them. <Back to Gallery Next> This Season Teachers Kids Orientation Registration Search Copyright 1997-2009 Journey North. All Rights Reserved. Questions or comments? Contact us.