They don't actually hum. they are called that from the sound of their wings.
yes
Soft as a baby's bottom.
Llamas hum for a few different reasons. Humming is a llama's main form of vocal communication. Mother and baby (dam and cria) will hum to each other, mom making sure cria is ok/ location of cria, and cria will answer in kind. Llamas hum when they are worried, anxious, and questioning. If you are with a llama long enough (like weeks or months), you can start to tell which hum means what. A happy llama does not hum, though.
To learn how to talk without moving your lips, you have to essentially learn how to hum. You can enunciate your words by using the back of your throat.
No baby Pokemon can learn Fly
Bengal Cats can swim and hum to baby's. They look like a little leopards.
Baby elephants learn everything from their mothers. When the baby grows up, and has its own baby elephants, the knowledge is passed down onto the baby, where the process is repeated for centuries.
Goldfrapp - Ooh La La
When they loose the baby feathers.
HUM
Hum?
Burey Bhi Hum Bhale Bhi Hum ended on 2009-06-26.