Dec.27 morning clear & calm. Tress began calling at daybreak during first bird song. Almost always I find an open hole when I localize song. Usually not a fresh excavation. Nothing in traps. Woad walked to the "old" trapping field, which is still green grass, almost turf, with only a few thistles. Still bur clover seeds on the ground. Set 10 mousers and caught 5 tress before 10 a.m. Total for July + me 53. Another bunch of owls in this field; two flew off when I approached but they made a series of shrill calls sort of like tires or dove birds to distract; and the 3 remaining marched down the furrow. They repeated this performance later (twice). Carol found 4 more burrows, at one of these all 4 hinds flew off. These observations of "famibles" swimming were about 8 a.m., warm and sunny. All 6 burrows had two tress scattered around, and a few pellets. Carol found other pellets under tall thistle plants.