What is the below Rebus indicate?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

What begins with T, ends with T, and has T in it?

What kind of tree can you carry in your hand?

How is a fly different from a mosquito?

81 x 9 = 801. What must you do to make the this equation true?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Can you find out the remainder when 3^300 is divided by 5?

Can you identify the famous TV character from the rebus below?