For instance , the very similarly - plumaged king and emperor penguins have UV - reflective spots in different positions on their beaks .
The position of such spots on the beak may be important in allowing birds to identify conspecifics .
The very similarly - plumaged king and emperor penguins have UV - reflective spots in different positions on their beaks .
The position of such spots on the beak may be important in allowing birds to identify conspecifics .