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Understanding and misunderstanding the migration of the monarch butterfly (Nymphalidae) in North America: 1857-1995
The present paper reconstructs the history of understanding the migration of the monarch butterfly in North America and reflects the spirit in which Charles Remington, then a graduate student at Harvard, and his friend and colleague Harry Clench founded The Lepidopterists' Society are reflected.
Decline of monarch butterflies overwintering in Mexico: is the migratory phenomenon at risk?
Abstract.  1. During the 2009–2010 overwintering season and following a 15‐year downward trend, the total area in Mexico occupied by the eastern North American population of overwintering monarch
Associations between host migration and the prevalence of a protozoan parasite in natural populations of adult monarch butterflies
Because monarchs form resident and migratory populations in different parts of the world, this host–parasite system provides the opportunity to examine how variation in parasite prevalence relates to host movement patterns.
Fueling the fall migration of the monarch butterfly.
It is proposed that for much of their journey monarchs are opportunistic migrants, and the variation within and between samples reflects butterflies' individual experiences, and changes in nectar availability are altering the butterflies' ability to accumulate energy.
It’s the first bites that count: Survival of first‐instar monarchs on milkweeds
A summary of detailed field-based studies of the early-stage survival of a specialist lepidopteran herbivore is presented, showing first-instar larvae of the monarch butterfly, Danaus plexippus, generally grew faster and survived better on leaves when latex flow was reduced by partial severance of the leaf petiole.
Detrimental effects of latex and cardiac glycosides on survival and growth of first‐instar monarch butterfly larvae Danaus plexippus feeding on the sandhill milkweed Asclepias humistrata
1. A novel experimental method was developed to study negative physical and chemical effects of latex and cardiac glycosides on first‐instar monarch butterfly larvae in their natural environment in
Animal Migrations: Endangered Phenomena
Synopsis. Current conservation research focuses on diminishing species diversity, minimal viable populations, and on the successive demise of habitats and populations that leads species to
Quantitative Changes in Forest Quality in a Principal Overwintering Area of the Monarch Butterfly in Mexico, 1971–1999
Abstract: Degradation of the oyamel fir‐pine forest ecosystem in central Mexico is a threat to the overwintering and migratory phenomenon of the eastern North American population of the monarch
The results of the comparison have been calculated because the question of accuracy is of very great importance to the study of wild populations, and it is particularly difficult to assess accuracy when the population is small.