Photographing bird nests containing chicks is a ‘big no-no’ in nature photography. If you were to submit such a photo to a photo contest, disqualification is usually the result.
In nature, various colour abnormalities can occur in animals, including birds. Albinism is one of them, but an even more common abnormality is so-called leucism; an abnormality in the pigment cells that leads to reduced pigmentation and can affect all types of pigments.