I think the exposure is pretty darn close, maybe just a bit hot in the reds, esp. on the bill of the back bird. Nice head angles on both, sharp.
The dark background is my main concern. It swallows up the birds a bit. I think the foreground would work ok, esp. with their bright pink legs, but would prefer a lighter background to show them off a bit more.
I don't know if you had any options about lower, or to one side or the other to get some separation from the background.
Very nice capture with these two and yes the blacks look exposed nicely, but I have the same concerns as Randy re:BG. The yellow patch directly behind the back bird's bill is distracting, and both birds get somewhat lost in the top half of the BG. Perhaps very carefully selecting the BG (QM would work well) and applying a small dose of gaussian blur would help with that - but it's easy to overdo it so be careful.