It is amazing what God's creatures can do! Obviously on the underside of this leaf is something of interest. Not visible to us but, for the warbler, a very good find!
God wants us to seek him and not leave any leaf unturned! He says in his word that "if you seek me, you will find me, if you seek me with all your heart. I will be found by you!" Jer29:13,14
God wants to be found, he revealed himself in Jesus Christ and he continues to reveal himself in his word. But he wants us to want to!! A half hearted warbler would not bother to look under the leaf. A half-hearted person will not bother to seek for God. HE has promised to be found but he wants us to make an effort. Are you willing to make an effort in your search for God?