“But the LORD said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for the LORD seeth not as man seeth; for man looketh on the outward appearance, but the LORD looketh on the heart.” (1 Samuel 16:7 KJV)
And God blessed them, saying, “Be fruitful and multiply, and fill the waters in the seas, and let birds multiply on the earth.” (Genesis 1:22 NKJV) (Displaying helps)
The Plumed Bird of Paradise is another bird trying to impress the females with his displaying. (They are also known as six-plumed birds of paradise, due to their six head quills. These birds were featured prominently in the BBC series Planet Earth.)