“One time as [Francis] was passing through the Spoleto valley, he came upon a place near Bevagna, in which a great multitude of birds of various kinds had assembled. When The holy one of God saw them, because of the outstanding love of the Creator with which he loved all creatures, he ran swiftly to the place. He greeted them in his usual way, as if they shared in reason. As the birds did not take flight, he went to them, going to and fro among them, touching their heads and bodies with his tunic.
“Meanwhile his joy and wonder increased as he carefully admonished them to listen to the Word of God: ‘My brother birds, you should greatly praise your Creator and love Him always. He clothed you with feathers and gave you wings for flying. Among all His creatures He made you free and gave you the purity of the air. You neither sow nor reap, He nevertheless governs you without your least care.’
“At these words, the birds gestured a great deal, in their own way. They stretched their necks, spread their wings, opened their beaks and looked at him. They did not leave the place until, having made the sign of the cross, he blessed them and gave them permission. On returning to the brothers he began to accuse himself of negligence because he had not preached to the birds before. From that day on, he carefully exhorted birds and beasts and even insensible creatures to praise and love the Creator.”
—From Thomas of Celano, The Treatise on the Miracle of Saint Francis, (1250-1252), ed. Regis J. Armstorng, OFM Cap, J.A. Wayne Hellmoann, OFM Cov, William J. Short, OFM, The Francis Trilogy of Thomas of Celano (Hyde Park: New City Press, 2004), 329-330.