they are both to use your mouth
The whistle is in the air to your mouth The sing is in the voice to your mouth
That must be a habit of his/her. To sing/whistle while walking
A coach that has a whistle, a Tea Kettle
Pop
Male canaries sing beautifully
No, budgies do not sing. They chatter a lot, mimic other sounds, and whistle, but they are not songbirds and thus do not sing.
Either one of them can whistle or sing, if they enjoy doing so.
Yes, a bird will usually sing when it hears another bird. We have a parakeet and when we whistle she answers.
Both makes sound.
Possibly. But he does whistle in the shower! ^_^ So cute!
There is a similarity between the theories.The twins had just one similarity.
Hah, no. Dragons are terrible singers. Their vocal cords aren't developed enough to sing. But they can whistle.