1. For the first pic, did you shot with DRO on? Remember, in a scene like that, it will try to recover shadows, which is not necessarily what you want. So either meter for the shadows (so DRO will recover highlights) or turn off DRO entirely.
2. For the second shot, it still looks ok since I can see the detail on the feathers, though shooting a subject like a swan against a black background is like shooting a bride in her white dress - you would need to adjust the exposure to capture properly, or use spot metering.
1. Yes, the DRO was set to D-R+ (advanced) in AUTO mode. This DRO really confused me...
2. well, i'm still finding a way to understand when to use spot metering. mine is set to multi segment.
all these were my first shots with DSLR.