A pair of Great Blue Herons building a nest on the high pole half way around the loop.
This is a tough place to build a nest that will survive high winds and last years nest got blown away. Hopefully this nest has better tie points to the cross beam.
As for the picture itself, I shot it against the prevailing light on an overcast day and had to boost the exposure to + 1EV to properly expose the birds. Thus the blown out sky.