The crimson rosella(platycercus elegans) beautifully illustrates a key evolutionary strategy… transforming from a camouflaged olive-green juvenile into the iconic crimson and blue adult to balance youthful survival with mature breeding displays
While the adult is famed for its brilliant crimson body and vivid blue cheeks and flight feathers, juvenile rosellas are almost entirely a muted olive green, a crucial camouflage that protects them from predators as they mature.