I do not normally have birding dreams, or at least if I do, I tend not to remember them. Last night was a different situation. I dreamt that I was in a foreign country, perhaps Belize if I remember correctly, but it may have been elsewhere. I was surrounded by new birds - ones that I did not recognize because I had never seen them before. Many were waterfowl, but others were songbirds. Unfortunately I had no way of recognizing them as I had no field guide and (I think) no binoculars with me.
I suppose that may count as a "birder's nightmare" - to have the opportunity to see many lifebirds but not to be able to identify them.