If General Revelation is the message from God to us through the natural world, Special Revelation is His word to us through the supernatural world. 

Special revelation includes physical appearances of God, dreams, visions, the written Word of God, and most importantly—Jesus Christ.[i]

Jesus reveals more about God than Creation, miracles and scriptures can together.  Furthermore, the Holy Spirit has come to amplify Jesus and all other revelations of God that have been given. 

Jesus listened to the reoccurring themes of human worry and anxiety.  He brought comfort and taught us to look to the supernatural by observing the natural realm.  Often our temporal concerns are rooted in metaphysical fears.  We are afraid of perishing.  We worry that God is not present to help us.  So, Jesus took a look around and pointed out what God had been trying to say all along.

Luke 12:
 22 Then Jesus said to his disciples: "Therefore I tell you, do not worry about your life, what you will eat; or about your body, what you will wear. 23 Life is more than food, and the body more than clothes. 24 Consider the ravens: They do not sow or reap, they have no storeroom or barn; yet God feeds them. And how much more valuable you are than birds! 25 Who of you by worrying can add a single hour to his life? 26 Since you cannot do this very little thing, why do you worry about the rest?
27  "Consider how the lilies grow. They do not labor or spin. Yet I tell you, not even Solomon in all his splendor was dressed like one of these. 28 If that is how God clothes the grass of the field, which is here today, and tomorrow is thrown into the fire, how much more will he clothe you, O you of little faith! 29 And do not set your heart on what you will eat or drink; do not worry about it. 30 For the pagan world runs after all such things, and your Father knows that you need them. 31 But seek his kingdom, and these things will be given to you as well.
 32 "Do not be afraid, little flock, for your Father has been pleased to give you the kingdom. 33 Sell your possessions and give to the poor. Provide purses for yourselves that will not wear out, a treasure in heaven that will not be exhausted, where no thief comes near and no moth destroys. 34 For where your treasure is, there your heart will be also.

I’m not sure how much consciousness birds have of God, but I doubt that any of them are agnostics.  Birds know what they know and that may include an awareness of the Creator.  All creation is apparently waiting for God to restore everything.  What are we waiting for?