When we were up in Alaska, we flew out to St. Paul Island for a few days. Although we saw quite a few birds that might qualify as rarities.... like RED-NECKED STINT:
... or WOOD SANDPIPER:
... or EYEBROWED THRUSH:
... the rarest species, for the island, was this simple and familiar dabbler, BLUE-WINGED TEAL:
You see, this was the first record of this species for the entire Bering Sea region. It's all relative.