P.A. Kelly 1988 Journal Thurs. 2145 p.s.t. Jeff + I headed out to check Mar. 10 and close all 12 traps. We caught >1521-22 (cont.) (last) at H.64; also had ♀ 1465 at H62. and ♀ 1347 (last.) at H.61. But the real action was in the ♀ 2250 Matriline. We caught ♀ 1489 at (last.) H.56, and then we caught her new son (1651-52) at H.51. Jeff started taping while I proceeded to weigh, and tag the little guy. I deliberately made him squeal by squeezing his ears a little. His mother ♀ 1489 responded right away and came out of and around H.51 a number of times, tail-rattling. What was even more interesting however, was that 2 other wood rats also tail-rattled in response to the youngsters distress calls. An unidentified rat was tail rattling (T.R.) in the willow canopy between H.51 & H.50. Also we could hear definite T.R. coming from inside a trap at H.50. The trapped rat at H.50 turned out to be ♀ 2250 (or selected) the matriarch of the group and the grand- mother of just >1651. Jeff's sophisticated directional microphone (Sennheiser Shotgun Microphone w. Microphone Amplifiers {Mineroff Electronics}) and Sony TCH 5000 EV Cassette Recorder was able to pick up the T.R. of all 3 wood rats as well as the squeals of