Several times this week, our guests indicated that they had seen javelinas - usually in our driveway.
Finally, on the 10th of December, my fortune changed, and I spotted a pack of four javalinas at the far end of our back yard! (The birds at the fountain remained unfazed.)
They eventually drifted to the west side of our house, and then down toward the wash on that side. One, however, ventured into our front yard.