Answers to Countdown Challenge Questions
Discussion of Challenge Question #9 (Day 2A):
From the time they dry off, baby hummers can hold up their heads and open their mouths to beg for food, and as soon as they swallow, they can poop. Right now they're still pretty tired and weak, but by tomorrow they'll start backing up a little so they can poop over the nest rim. Even that little job is pretty hard work at first! It's not much of a life, but by the time they're nine days old and their eyes open, baby hummers are starting to learn that there's a lot more to life!
Except for a very few birds like penguins, who swim in VERY cold water, most birds don't need to grow feathers over their whole bodies. One individual feather is a lot wider than one hair, and can cover a bigger space on a bird's body than one individual hair can cover on a mammal's body. But feathers take a lot of energy to produce. To save energy, birds produce just enough outer feathers to completely cover their bodies when the feathers are groomed properly. An adult hummingbird has only about 940 feathers on its whole body. That's many fewer feathers than an adult mouse has hairs!
Human eyeballs can turn and roll to see up and down and to both sides. Our eyelids are shaped as they are so that our eyes can still see when they move side to side. Also, when birds fly, the rush of air has a drying effect. To protect their eyes from drying out, they cover as much of the eye as possible behind skin and feathers. And bird eyes can't roll like our eyes do. Because their eyes are much more "fixed" in the socket, there's no need to have eyelids made for turning eyes from side to side. Birds can't open their eyes any wider than their pupil and iris.
They can feel the wind from her wings on their skin, and they can hear the little "mew" call she makes to them.
Answers will vary.
They have each other! If you could hold them in your hand, their bare skin would feel hot against your skin. They nestle against each other and the thick walls and bottom of their nest. This helps their body heat stay in their own bodies and they share heat with each other.