Steinberg, E.L.C. 1988 Peromyscus californicus # 1295 Hastings Reservation, Monterey Co., Calif. June 2 Animal caught below bridge in front of bunkhouse. Dusted GREEN, with purpose of determining whether her mate is so that they can be studied in captivity. June 6 Caught again and redusted GREEN. June 8 Caught at 11:30 pm (23:30 hr.) and placed into cage. Given rolled oats. June 9 Weight = 41.5 grams. Fed ¼ apple, some carrot pieces and some greens. Grass, Spanish moss and leaves provided as nesting material. She is currently imperforate. June 11 Missing June 13 Recaptured and put back in enclosure. Wt = 38g. Imperforate June 14 weight = 40.0 grams. Imperforate. June 15 weight = 39.0 grams. Imperforate. June 16 weight = ? (no scale). Perforate. June 17 weight = 41.0 grams. Imperforate. June 18 weight = 41.0 grams. Given more crushed rodent claw. June 19 weight = 42.0 grams. Imperforate June 20 weight = 43.0 grams. Perforate? (slight hole) June 21 weight = 43.0 grams. Imperforate. Given fresh greens, apple, carrot. June 23 weight = 46.0 grams. Imperforate. I've decided to check on them every day, but just weigh them every other day to minimize “harassment”. Today I cleaned the cage. June 25 wt = 47g - Pregnant (palpable). Vagina imperforate, but discharge present. June 26 12:15h. Wt = 47g - Imperforate, but vaginal discharging urine-like fluid. June 27 12:20h Wt = 47g. Imp. June 28 10:45h Wt = 47.5g. Perforate June 29 0930h - she was in the nest box when I opened it. It grabbed her and then was a pup with afterbirth still covering its head and the vagina of the female was swollen and bloody. So, presumably she just gave birth! We left her alone since it felt like she had another baby left to birth. The male was in the opposite side side of the enclosure. June 30 1540 h wt = 42.0g. Two babies found -- both (?) eyes closed, ears not folded back 1) 5.78g 2) 5.27 Can barely stand on all fours. Not using nest box.