The Ocean

The Oceans takes up 7 10ths of the earth. But the ocean is actually only 96.5% water. The other 3.5% is 2.75% Sodom chloride and 0.78% other things.
  The ocean contains 360 quintillions gallons of water. (And just so you know; a quintillion is a billion billions which is 6 sets of 3 zeros or18 zeros.
  Gallons of water int the ocean:
               1,000,000,000,000,000,000, times 360. That's a lot of water.
   One cubic mile of ocean water contains:

           4.5 billion tons of water

           128 million tons of Sodium Chloride (table salt)

           18 million tons of magnesium chloride

           8 million tons of magnesium sulfate (Epsom salt)

           6 million tons of calcium sulfate

           4.2 million tons of potassium chloride

           470,000 tons of calcium carbonate

           47,000 tons of rubidium

           1,400 fluorine

           1,400 tons of nitrogen

           470 tons of zinc

           380 tons of phosphorous

           380 tons of arsenic

           94 tons of iodine

Any way that's a lot of things in one cubic mile of ocean.

Leep-a-Year

Today is Leap-a-Year.
The twenty ninth of February! A big day because it only comes every four years.
  Do you know why that is?
  Well, the earth takes approximately 365 and one quarter days to orbit the sun. So what dose one do with the extra quarter day?
  If you just let it be, with in ten years, you would have Christmas in July and fourth of July in December. (I was just guessing on how many years it would take to mix every thing up.) But it would get mixed up if some very smart person hadn't figured out what to do about that small issue.
  So every four years, you add an extra day. And because February got dumped with the bad end of the day deal and got stuck with only twenty eight days, some one decided to give February the privileged of getting the Leap-a-Year day.
  There is also a Leap-a-Second because the earth doesn't take exactly twenty four hours to go around in a circle but that's another confusing matter.
  "So have a very Happy Leap-a-Year! :)
  

The Answer

The white birds are White Pelicans.
They were rather odd looking birds.