I think part of the fun of wildlife photography is how little control you have over things. When things work out it’s that much better. That’s what happened here.
Not only was the Stork are a good height and distance, the marsh grasses made a great back drop.
The first two photographs here caught the green tint in the black tipped wings. The feathers are not pure black if you hit the light right. View in full size and you can see the iridescent green come through.
There was a wind, the grass is bent here, which may have slowed the bird down a little. Flight shots can be tricky once those big wings have some momentum.