Psittacofulvin
Encyclopedia
Psittacofulvin pigments cause the bright-red, orange, and yellow colours of parrots. Colourful feathers with high levels of psittacofulvin resist feather-degrading Bacillus licheniformis
better than white ones.
Bacillus licheniformis
Bacillus licheniformis is a bacterium commonly found in the soil. It is found on bird feathers, especially chest and back plumage, and most often in ground-dwelling birds and aquatic species ....
better than white ones.