Past tense: The flock of birds was flying. Present tense: The flock of birds is flying. (flock is a collective noun)
A spoon or any device will "mix ingredients together." A wisk preforms a very important additional function -- it incorporates larger amounts of air into the item(s) being mixed. An example is...
A Mammal. It is a squirrel. I had 3 pet flying squirrels when I was young.
No. Only flying elephants have bannanas.....every one knows that
"Flying is the act or process of flight" Source: http://en.wikipedia.org/wiki/Flying