There is something particularly fascinating about white. Maybe it is that we associate the absence of color with purity or maybe is just all the cultural meanings attached to it, but white, specially white birds are fascinating to watch.
In one hand, we love colourful birds, like those found in the tropics, but on the other and entirely white plumage is as appealing as any amount of coloured feathers. Also white birds are not easy to photographed, To capture the purity of the plumage in the perfect exposure requires knowledge and experience, specially if the bird takes up a lot of space in the viewfinder.
These are just some shots where white triumphs in the image. In many others I have failed to capture its essence, usually by underexposing it. When color is not the main attraction, composition and image quality become more important. Color, even though beautiful, can sometimes become a distraction, both for the viewer and the photographer. Decoration can opaque poor structure.