Nancy and I celebrated Earth Day by birding for half the day at BDMRP.  During the drive to the upper parking lot, I noticed a very large bird that was being dogged by a smaller bird.  The smaller bird turned out to be a Red-tailed Hawk and the larger bird was a Golden Eagle. Great way to start the day.  During our two-mile walk we encountered at least six Ash-throated Flycatchers, one of our target birds for the day.  Although they remained hidden in the foliage, we had about six Black-headed Grosbeaks calling during our hike.  In addition, we saw and/or heard at least four Bullock’s Orioles and a single House Wren.