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Petition for Protection of the Monarch Butterfly Under the Endangered Species Act

The monarch was proposed for listing in 2014 through a petition submitted by the Xerces Society and our conservation partners, including Center for Biological Diversity, Center for Food Safety, and the late Dr. Lincoln Brower. The monarch faces many threats including the loss of milkweed and other flowering plants across its range, degradation and loss of overwintering groves in both coastal California and Mexico, and the widespread use of pesticides in the environment.

Serial Number
14-058
Version Number
01