What is always in front of you but can’t be seen?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

I taste better than I can smell. Who am I?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

It belongs to you, but other people use it more than you do. What is it?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?