The butterflies migrate back to California from Eastern Washington in September and October. Much of what is know about the migration of of monarch butterflies in the West comes from James ...

before flying back toward the eastern and central parts of the United States for summer. It’s the western population that Washington residents are used to seeing. Those butterflies spend their ...

Haddad, who was not directly involved in the listing, estimates that the population of monarch butterflies he studies in the eastern United States has declined between 85% and 95% since the 1990s.

Haddad, who was not directly involved in the listing, estimates that the population of monarch butterflies he studies in the Eastern United States has declined between 85 percent and 95 percent ...

There are two types of migratory monarchs in North America: the Eastern monarch butterflies and the Western ... Oregon and Washington state, are at greatest risk of extinction, according to ...

There are two types of migratory monarchs in North America: the Eastern monarch butterflies and the Western ... Oregon and Washington state. These insects typically overwinter along the California ...

between Los Angeles and San Francisco. Courtesy Washington State University The butterflies migrate back to California from Eastern Washington in September and October. Much of what is know about ...