Guarding the Nest or Just Posing?

There is a ledge in the brick above the patio door, and every year robins attempt to build nests there.  We have given up discouraging them, and one couple came back this year, adding to the nest that was already in the corner.  They come and go without being discouraged or afraid when we are on the patio.  (I think that they are less afraid of us than of the large numbers of predatory magpies that inhabit the long row of evergreen trees to the northeast.)  We've decided that this is the father, and he often stands guard somewhere near the nest.  Yesterday morning, in the drizzle, he was posing perched on the Earth Box, next to the flowering chives.  Nice pose!  Now, if we just can be lucky enough to be around when the babies fly away.  Last year, it was quite a show.  The last little chick teetered on the edge of the nest, finally took off, and took a loopy flight to the nearest evergreen tree, doing some real acrobatics to hang on to a limb.  Ah, spring!