Science Center Objects

We are a leader in the Monarch Conservation Science Partnership (MCSP) which includes a variety of resource management organizations both Federal (including the National Park Service and the U.S. Fish and Wildlife Service) and non-Federal (including Xerces Society).

Recent MCSP workshops developed conceptual and information frameworks, including advanced models, to identify priority monarch butterfly habitat that can support conservation decision-making by a variety of stakeholders. In collaboration with the U.S. Fish and Wildlife Service, we are developing a conceptual framework and monitoring protocols to assess landscape-scale conservation effectiveness and Monarch Butterfly habitat restoration across the Monarch migratory flyway in the eastern United States.

Decline in the eastern migratory monarch butterfly population as surveyed by the World Wildlife Fund-Mexico
Decline in the eastern migratory monarch butterfly population as surveyed by the World Wildlife Fund-Mexico.Populations in the high-elevation Oyamel fir forests where eastern monarchs overwinter are indexed by the area over which they occur.Semmens et al. (2016) provided an adjusted measurement of population size which corrects for observation error.(Public domain.)

Monarch Conservation Science Partnership

The Monarch Conservation Science Partnership (MCSP) is a USGS led group of scientists, managers, and conservation organizations who perform science related to the conservation of monarch butterflies. We come from federal agencies, non profits, and academia and from the three countries where monarchs range (Mexico, Canada, and the United States).

► Learn more at the MCSP web site

► View data interactively on the MCSP map viewer


Monarch Butterfly Utilization of Milkweed Plants Grown in Close Proximity to Corn Treated by a Neonicotinoid Insecticide 

Monarch butterfly populations have declined sufficiently to result in noticeably fewer overwintering at sites in central Mexico as in California. The causes for the reduced population are not fully known, but may include loss of overwintering habitat and reproduction habitat. In the latter instance, increased herbicide (i.e. glyphosate) use in the Midwestern U.S. is blamed for a drastic decline of milkweed, which is the host plant for the Monarch butterfly. 

► Learn more about Monarchs and Milkweed plants


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