He shall cover thee with his feathers, and under his wings shalt thou trust: his truth shall be thy shield and buckler. (Psalm 91:4 KJV)
The Coot article mentioned the shield. “Coots have prominent frontal shields or other decoration on the forehead…”
What is a “frontal shield”?
The place above the upper beak (upper mandible) has a platelike area. It is made of a fleshy material. When the Lord created those birds that have the shield, He gave them each a different looking shield. It is neat to see the variety that the shields have. I am sure that the bird uses them to know which are their kind.
Below are some photos of the various Frontal Shields on the birds. There are more birds that have shield, but this just a sample of these unique birds.
You have also given me the shield of your salvation: and your right hand has held me up, and your gentleness has made me great.
(Psalms 18:35 AKJV)