Birds (B&W + Sepia)

I wandered over to the Botanic Gardens to learn to use my new 70-200VR.
This fellow was soaring around in the afternoon sun. It was difficult to get the detail of his black feathers. 1/300 @ F5.6
I then tried for some more context (it's a bit boring seeing black birds against a flat sky). The best approach seemed to be grabbing them as they flared for landing. 1/300 @ F4.5
I also went for some long panning shots and jagged this one which combines impressionistic pastel softness with razor-sharp water droplets.
This looks much better in high-res. Click the photo for the original (2.3MB). 1/40 @ F4.5.
Oh, I promised you something white! He looks a little yellow in the setting sun though. 1/640 @ F4
C&C welcome. I had a lot of trouble bringing out the detail in the black birds. Any hints?
This fellow was soaring around in the afternoon sun. It was difficult to get the detail of his black feathers. 1/300 @ F5.6

I then tried for some more context (it's a bit boring seeing black birds against a flat sky). The best approach seemed to be grabbing them as they flared for landing. 1/300 @ F4.5

I also went for some long panning shots and jagged this one which combines impressionistic pastel softness with razor-sharp water droplets.
This looks much better in high-res. Click the photo for the original (2.3MB). 1/40 @ F4.5.

Oh, I promised you something white! He looks a little yellow in the setting sun though. 1/640 @ F4

C&C welcome. I had a lot of trouble bringing out the detail in the black birds. Any hints?