I feel that this should have finished with a score above 6. I like that the body of the bird is center focused. The light and detail you captured is excellent.
It's nice to see these majestic birds and yes, you focused on the feathers, But your composition and cropping thereof could've been better. Always keep the rule of thirds in mind, there is a reason for it, it creates an emotion and makes a statement
Not sure that was a kiss from what I've seen of flamingo interactions and the way the foreground bird is poufed, but those feathers make a nice pattern. I might have tried cropping closer to emphasize them even more.