Some background.
I must have been in 3rd to 6th grade and it was some time at or before Christmas that I dreamt it.
My sister was going to school in Denmark and she came home (Tórshavn, Faroe Islands) to celebrate Christmas with us. After Christmas and New Year she was going back to Denmark to continue her schooling. To travel she would go to the airport and take the plane. In those days it was possible to get very close to where people went onboard the plane and wave to the departing family or visitors. Only a masked fence would seperate us from them, as security in those days was not that much.

Oyster Catcher - Haematopus Ostralegus

The dream
I dreamt that I was at the airport and had just said good bye to my sister inside the terminal, and now had gone with the suitcase and so on to the area where we could no longer talk to her, so the next time I would have a chance to see her and say good bye or waive would be outside the building.
After going through customs she would go out of the building and be just 4-5 meters from the fence where I would stand outside on her right side ready to greet her good bye and waive to her.

As I stood there waiting for her in the cold January winther weather I noticed something strange. I saw three (3) oyster catchers (our national bird in Faroe Islands) on the gras just to the left of the exit door. They were calmly walking on the gras not far from some smaller areas of snow that was on the gras. I thought it was very strange as oyster catchers are not in Faroe Islands that time of year - January. They have already months before gone south to the warmer countries and arrive around the 12th of April.

Suddenly the oyster catchers noticed something, looked in the direction of the exit door and started flying away. First one and then the two others. Then my sister came out and walked to the airplane with out waiving to me.

When I woke up I was amazed of the dream and that I had dreamt of oyster catchers and my sister leaving. I had not dreamt such things before, and I just disregarded the film as nonsence.

What happened in reality?
In reality everything happened exactly as I had dreamt. I just did not remember it until the first of the three oyster catchers started flying, that I had dreamt this. I though: "Eh, this is just as in the dream I dreamt earlier! Amazing!!! Oyster catchers on the gras with snow outside the exit door of the airport terminal and me outside waiting to waive to my sister."

My sister did not waive to me, but I was left with an amazing experience, that I probably will never forget.