This picture is of the Indonesian Alabaster Pegasus. They are extremely rare and beautiful creatures, and are best observed at a distance. Discovered by Bert Frantaloon in the 1930s, there were only 40 of them left. As of today, there are 400, but are unlikely to be seen, seeming to stay in dark caves.

HOW YOU CAN HELP
When you see them in their natural habitat, keep far away and leave them alone. It is pointless to shoot them, because they are immortal, and can NEVER die. Taking pictures is pointless; they will just give you bad angles. Plus, nobody will believe you. CASE CLOSED.

This here is a Domesticated Household Pet Unicorn. It is not very special. All that they do is poop and spear things with their horn. They can, under certain circumstances, be taught to fly. Other than that, they just make horrible pets. Most of the time, they are put up for adoption. But they are only purchased for movies.
HOW YOU CAN HELP
If you see one, do nothing. Leave it alone; it is not worth your time. It will just poo on you. CASE CLOSED.

As you can see by this picture, the unicorn is attempting to bite the moon. That is because unicorns are addicted to light, and so instinctively, they eat their light source at nighttime. This is a Rare Shiny Sparkly White Unicorn, of which there are only 2 left in the world(and in never land).

How You Can Help
You can report them to animal control if you see them in the wild. DO NOT SHOOT AT THEM. This is highly normal to see a mythical creature, as long as you are having regular visits with your psychiatrist. You are very lucky to have seen the world's rarest creature. CASE CLOSED.