We review the postulated threatening processes that may have affected the decline in the
eastern population of the monarch butterfly, Danaus plexippus L.(Lepidoptera …

Monarch butterflies (Danaus plexippus) are familiar herbivores of milkweeds of the genus
Asclepias, and most monarchs migrate each year to locate these host plants across North …

1. The size of the Mexican overwintering population of monarch butterflies has decreased
over the last decade. Approximately half of these butterflies come from the US Midwest …

The monarch butterfly (Danaus plexippus) population in North America has sharply declined
over the last two decades. Despite rising concern over the monarch butterfly's status, no …

Insect migration may involve movements over multiple breeding generations at continental
scales, resulting in formidable challenges to their conservation and management. Using …

1. The monarch has undergone considerable population declines over the past decade, and
the governments of M exico, C anada, and the U nited S tates have agreed to work together …

Climate change can profoundly alter species' distributions due to changes in temperature,
precipitation, or seasonality. Migratory monarch butterflies (Danaus plexippus) may be …

Understanding the impacts of climate on migratory species is complicated by the fact that
these species travel through several climates that may be changing in diverse ways …

Abstract Eastern North American monarch butterflies (Danaus plexippus L.) show a series of
range shifts during their breeding season. Using ecological niche modeling, we studied the …

Pest species distribution modelling was designed to extrapolate risks in the biosecurity
sector in order to protect agricultural crops against the spread of both endemic and …