I was investigating a noise I heard in the ravine behind the chicken area. I didn't see the source of the noise but I did see two birds fly up from the forest. Both were carrying very long pieces of nest material.
They flew into the neem tree to work on the nests they are building. One nest is very large and the other on the more far reaching part of the branch (not in the photo above) appears to be still in construction. I imagine one is used as a decoy nest.
Here's a shot of the more complete looking nest in our neem tree.