Hello Bedanta, love the flamingos. Your depth of field for a group of birds was too narrow at f/8 and a shutter speed of 1/800. I would have dropped the shutter speed to 1/400 or 1/500 and shot at f/16 to increase the depth of field.
Trying to isolate a suitable smaller group from a large assembly is always tricky; no matter whether it is birds or people.
I would prefer to clone out the legs which are 'hanging down' from the top edge, particularly from the first image.
Otherwise, it looks good to me.