I'm assuming you mean that there used to be stripes and now the stripes are receding and it is just yellow on top of his head. This happens because your bird is getting older. This is normal so there is no problem. If this is not what you were asking about, then I need more information. :)
it is turning yellow because people r peeing on it
The boxwood's leaves are turning yellow due to a lack of nutrients, overwatering, or a fungal infection.
The Adventure of the Yellow Face was created in 1894.
The leaves on your plant may be turning yellow due to overwatering, nutrient deficiencies, pests, or inadequate sunlight.
The excess bilirubin usually leads to our hands turning yellow.
The basil plant's leaves may be turning yellow due to overwatering, nutrient deficiencies, or lack of sunlight.
The bottom mint leaves are turning yellow likely due to overwatering, lack of sunlight, or nutrient deficiencies.
The elephant ears' leaves are turning yellow likely due to overwatering, nutrient deficiency, or inadequate sunlight.
The plumeria tree's leaves may be turning yellow due to overwatering, nutrient deficiencies, or pest infestations.
The Yellow Face - 1921 is rated/received certificates of: UK:A
Zucchini turns yellow due to overripening or lack of nutrients.
Your squash fruit may be turning yellow due to overripening, lack of nutrients, or a fungal disease called powdery mildew.