|detail from Altdorfer's Rest on the Flight from Egypt, 1510|
So I looked a little more and found a website that lists over 100 paintings with that same title! You can see the list with links to the various versions here. I guess that isn't so remarkable for biblical stories, but it did surprise me.
Here's Wikipedia's description of the subject matter (of the Caravaggio painting):
"The scene is based not on any incident in the Bible itself, but on a body of tales or legends that had grown up in the early Middle Ages around the Bible story of the Holy Family fleeing into Egypt for refuge on being warned that Herod the Great was seeking to kill the Christ Child. According to the legend, Joseph and Mary paused on the flight in a grove of trees; the Holy Child ordered the trees to bend down so that Joseph could take fruit from them, and then ordered a spring of water to gush forth from the roots so that his parents could quench their thirst. This basic story acquired many extra details during the centuries.From the photo I took of the calendar, you can't quite make out that Altdorfer's angels are also playing music, but with a small harp and a flute like instrument.
Caravaggio shows Mary asleep with the infant Jesus, while Joseph holds a manuscript for an angel who is playing a hymn to Mary on the violin."
Actually, I thought I was going to put up pelican and other bird pictures today.