Migrates

In the Northern Hemisphere, most birds fly South for the Winter.
Just as in the Southern Hemisphere, most birds fly North for their Winter.
Except for birds that can’t fly, like Kiwi or Ostriches or Penguins, of course.
I’m not sure what they do.
Do they dig burrows and hide in them?
Do they check into motels?
Or do they hop on trains?
Because I’m sure that they aren’t allowed on buses or planes.
Maybe cargo ships. There’s a lot of cargo ships out there.
But they tend to go from China to America.
And oil tankers just carry oil.