G'day,
I think Mother nature was playing nasty tricks on photographers making black and white birds, an exposure nightmare
I like the narrow DOF of the first making the viewer focus (excuse the pun) on the central subject but strewth, gonna struggle with exposure on that bird...
The exposure on the white one is bloody great, would be tricky getting such nice feather detail on a stark white bird, you've done a good job on the exposure, I would have blown it to buggery

Great to get the reflection like that too...
You have some nice shots in your gallery, the "Purple Swamphen at Underwood Park" is a pearler...