I think they call this one "kaeng phet bet yang" -- roughly "hot curry BBQ duck," or something like that.

One of my favorite dishes when done well.

There's a restaurant in one of the "red-light districts" called "Love Scene" that makes a awesome red curry duck, on Sukhumvit Soi 23.

I'm usually too embarrassed to bring my Thai friends there because of the area... but I did break down and bring 2 of my Thai teachers there once, and they thought the food at the restaurant was excellent.