I cross-searched dharma and swan and I found this story about the life of the original Buddha.

excerpt: He was reputed to have been born wise and compassionate, as is illustrated by the following story. The child Siddhartha played in the garden, a white swan fluttered to his feet, an arrow piercing its wing. Calming the frightened bird, the child gently removed the arrow, and sat there quietly with the swan on his lap. Siddhartha's cousin Devadatta entered the garden and demanded the swan: This is my bird, give it to me, it was I who shot it. Siddhartha replied, No, if it was dead you might have a claim to it, but it is alive and a free creature. Devadatta said, Alive or dead, what is the difference, it is mine for I brought it down. Siddhartha contradicted him: No, it is mine, the first of many beings, which shall be mine by right of mercy, and I shall teach compassion to all and speak for those who have no speech. Devadatta eventually brought his cousin to court, but was humiliated when the court decided in Siddhartha's favor. Devadatta grew jealous and hostile, becoming the Buddha's implacable enemy.

Found at this site: http://www.littlesteven.com/bt2.html

The rest of the entry has a lot of info on the life of Buddha, and mentions dharma. Very interesting read.