Alonso-Mejia, A., Arellano-Guillermo, A., Brower, L. P. 1992. Influence of temperature, surface body moisture and height above ground on survival of monarch butterflies overwintering in Mexico. Biotropica (Lawrence) 24:415-419 [Keywords: behavior, overwintering, thermoregulation]

Anderson, J. B., Brower, L. P. 1996. Freeze-protection of overwintering monarch butterflies in Mexico: critical role of the forest as a blanket and an umbrella. Ecological entomology 21:107-116 [Keywords: ecology, behavior, physiology, overwintering, clustering, deforestation, conservation]

Beall, G. 1948. The fat content of a butterfly, Danaus plexippus Lin., as affected by migration. Ecology 29:80-94

Hayes, J. L. 1982. A study of the relationships of diapause phenomena and other life history characters in temperate butterflies. American Naturalist 120:160-170

Herman, W. S. 1973. The endocrine basis of reproductive inactivity in monarch butterflies overwintering in central California. Journal of Insect Physiology 19:1883-1887

Herman, W. S. 1981. Studies on the adult reproductive diapause of the Monarch butterfly, Danaus plexippus. Biological Bulletin (Woods Hole) 160:89-106

Herman, W. S., Brower, L. P., Calvert, W. H. 1989. Reproductive tract development in monarch butterflies overwintering in California and Mexico. Journal of the Lepidopterists' Society 43:50-58 [Keywords: physiology, reproduction, overwintering, diapause, California, Mexico]

James, D. G. 1982. Ovarian dormancy in Danaus plexippus (L.) (Lepidoptera:Nymphalidae)-oligopause not diapause. Journal of the Australian Entomological Society 21:31-35

James, D. G. 1982. A transient non-breeding population of Danaus plexippus (L.) (Lepidoptera: Nymphalidae) near Picton, New South Wales. Australian entomological magazine 8:96-99

James, D. G. 1983. Induction of reproductive dormancy in Australian monarch butterflies. Australian Journal of Zoology (Melbourne) 31:491-498 [Keywords: physiology, behavior, reproduction, dormancy, weather, Australia]

James, D. G. 1984. Overwintering biology of the monarch butterfly, Danaus plexippus in New South Wales. Ph.D. thesis at Macquarie University.

James, D. G. 1984. Population and general biology of non-reproductive colonies of the monarch butterfly, Danaus plexippus (L.) (Lepidoptera: Danaidae) in New South Wales. Australian Journal of Zoology (Melbourne) 32:663-670 [Keywords: behavior, overwintering, mark-recapture]

James, D. G. 1986. Effect of temperature upon energy reserves of the monarch butterfly, Danaus plexippus (L.) (Lepidoptera: Danaidae). Australian Journal of Zoology (Melbourne) 34:373-379 [Keywords: physiology, overwintering, Australia]

Jones, R. E. R., J. 1987. Reproductive seasonality in the tropical genus Eurema (Lepidoptera: Pieridae). Biotropica (Lawrence) 19:7-16

Leong, K. L. H. 1995. Initiation of mating activity at the tree canopy level among overwintering monarch butterflies in California. Pan-pacific entomologist 71:66-68 [Keywords: behavior, reproduction, mating, overwintering, California]

Leong, K. L. H., O'Brien, E., Colleran, M. 1995. Mating activity and status of overwintering monarch butterflies (Lepidoptera: Danaidae) in central California. Annals of the Entomological Society of America 88:45-50 [Keywords: behavior, physiology, reproduction, mating, spermatophore]

Sims, S. R. 1984. Reproductive diapause in Speyeria (Lepidoptera: Nymphalidae). Journal of Research On the Lepidoptera 23:211-216

Tauber, M. J. T., C. A. 1976. Insect seasonality: Diapause maintenance, termination and postdiapause development. Annual Review of Entomology. 81-107