Pearson 1958 had become separated in the cage, we put them all together in one cage hoping they would match up but none did. Castrated 3 young males (about 7 gm weight). One young castrate flew - perhaps his first flight - he was 39 mm forearm, wt. 7.5 gm. We also took notes on when eyes are open & when ears are up. Again noticed that the older young can make adult noises (about 6 grams). Another thing we noticed was the special attention mothers gave to the baby bats that had fluttered to the ground. One anxious mother who had landed on our cage holding the baby bats, repeatedly flew down to a young who was making its way across the floor. It apparently was not hers - the baby paid no interest in her, and after she sniffed at him she didn't seem to try to pick it up. May took the babies up to the attic & noticed more of the same behavior - when a baby would flutter to the floor the mother seemed to come after it rapidly. Temp. 52° in attic. Looked for the Bolivia colony. Found the tunnel, which seemed fairly cold, but no bats there 8 PM. One of the Inverness bats was just beginning to flutterate when we spotted her & put her in a separate cage for observation. She kept her