. The Canadian field-naturalist. 244 The Canadian Field-Naturalist Vol. 93. Solonetz Soils 114° no^ Figure I. Distribution and estimated size of Little Brown Bat maternity colonies located in Alberta, 1971-1977. from published data and our own field activities. Most roosts were entered to identify and enumerate the bats present. Bats were periodically collected at maternity roosts for rabies testing and additional bats were captured at maternity roosts known to harbor rabies, a variety of non-maternity shelters, a hiber- naculum, and by mist-netting over ponds and streams. Aggregations of bats
. The Canadian field-naturalist. 244 The Canadian Field-Naturalist Vol. 93. Solonetz Soils 114° no^ Figure I. Distribution and estimated size of Little Brown Bat maternity colonies located in Alberta, 1971-1977. from published data and our own field activities. Most roosts were entered to identify and enumerate the bats present. Bats were periodically collected at maternity roosts for rabies testing and additional bats were captured at maternity roosts known to harbor rabies, a variety of non-maternity shelters, a hiber- naculum, and by mist-netting over ponds and streams. Aggregations of bats in buildings in fall ('fall aggrega- tions') were sampled in 1975. The following informa- tion was recorded for each bat: age (juvenile or adult) as determined by the closure of the epiphyses of the finger joints, sex, and weight. Examination of the nipples of adult female bats(Racey 1974) provided an indication of their reproductive history, and the current reproductive condition of a sample of female bats taken prior to the commencement of parturition was determined by uterine examination. The number of fetuses and the horn of implantation were recorded for pregnant females. Eight non-parous unsuckled female bats collected at shelters in mid-June were aged by dental annuli (Schowalter et al. 1978b) to determine the ages of non-breeding Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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