Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

Posts Tagged: migration

A Flash of Orange: Welcome, California Tortoiseshell!

A California Tortoiseshell (Nymphalis californica) nectaring on a butterfly bush (Buddleia davidii) in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

A flash of orange. Usually we see assorted orange butterflies--Gulf Fritillaries (Agraulis vanillae) or Painted Ladies (Vanessa cardui) or Monarchs (Danaus plexippus)--on our butterfly bush (Buddleia davidii). This time the flash of orange proved to be...

Not a Good Time to Be a Monarch Caterpillar

A monarch caterpillar munches on   tropical milkweed in Vacaville, Calif. on Friday, Oct. 27. (Photo by Kathy Keatley Garvey)

Migrating monarchs are fluttering daily into our yard in Vacaville, Calif., one by one, two by two, three by three, and four by four, for a little flight fuel. They're sipping nectar from the Mexican sunflower, Tithonia rotundifolia, and tropical...

Posted on Monday, October 30, 2017 at 4:22 PM

Are Western Monarchs Heading for Extinction?

A male monarch takes flight on Sept. 12 in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Are western monarch butterflies heading for extinction? A Sept. 7 article in Reuters, headlined "Monarchs in Western United States Risk Extinction, Scientists Say," indicated that "Monarch butterflies west of the Rocky Mountains are teetering on the...

Marvels of Migration

A mighty male Monarch on the move. On its way to one of coastal California's overwintering sites, it stops to sip from flight fuel (nectar) from a Mexican sunflower, Tithonia. (Photo by Kathy Keatley Garvey)

Lately we've been fascinated by the migrating Monarch butterflies (Danaus plexippus) heading to coastal California and central Mexico for their overwintering sites. For years we've marveled at the migrating whales passing Point Reyes as we stood glued...

Posted on Monday, November 3, 2014 at 5:55 PM

Welcome Back, Painted Ladies

A female butterfly, a painted lady, nectaring on Spanish lavender on March 8 in the Benicia Community Garden. (Photo by Kathy Keatley Garvey)

The painted ladies are on move. Butterflies. Scores of painted ladies (Vanessa cardui) are now migrating north from their overwintering sites near the U.S. Mexico border.  On Saturday, March 8 we saw two of them nectaring on Spanish lavender...

Posted on Monday, March 10, 2014 at 10:04 PM

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