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...

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

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

The California Tortoiseshell is bright orange with black spots on the wings, but the underside is a dullish gray-brown, resembling a dead leaf. (Photo by Kathy Keatley Garvey)
The California Tortoiseshell is bright orange with black spots on the wings, but the underside is a dullish gray-brown, resembling a dead leaf. (Photo by Kathy Keatley Garvey)

The California Tortoiseshell is bright orange with black spots on the wings, but the underside is a dullish gray-brown, resembling a dead leaf. (Photo by Kathy Keatley Garvey)

This image of the California Tortoiseshell shows the dullish brown and gray underwings, a perfect camouflage. (Photo by Kathy Keatley Garvey)
This image of the California Tortoiseshell shows the dullish brown and gray underwings, a perfect camouflage. (Photo by Kathy Keatley Garvey)

This image of the California Tortoiseshell shows the dullish brown and gray underwings, a perfect camouflage. (Photo by Kathy Keatley Garvey)

Sometimes it seems like forever before the California Tortoiseshell spreads its wings. This one did several times before it fluttered off. (Photo by Kathy Keatley Garvey)
Sometimes it seems like forever before the California Tortoiseshell spreads its wings. This one did several times before it fluttered off. (Photo by Kathy Keatley Garvey)

Sometimes it seems like forever before the California Tortoiseshell spreads its wings. This one did several times before it fluttered off. (Photo by Kathy Keatley Garvey)

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...

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

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

Pacific Northwest monarchs began migrating to their overwintering sites along coastal California in last August and early September. This one touched down on milkweed in Vacaville, Calif. on Sept. 12. (Photo by Kathy Keatley Garvey)
Pacific Northwest monarchs began migrating to their overwintering sites along coastal California in last August and early September. This one touched down on milkweed in Vacaville, Calif. on Sept. 12. (Photo by Kathy Keatley Garvey)

Pacific Northwest monarchs began migrating to their overwintering sites along coastal California in last August and early September. This one touched down on milkweed in Vacaville, Calif. on Sept. 12. (Photo by Kathy Keatley Garvey)

This was the scene Nov. 14, 2016 at the  Natural Bridges State Park's Monarch Grove Butterfly Natural Preserve, Santa Cruz. They were overwintering 80 feet high in a eucalpytus tree. (Photo by Kathy Keatley Garvey)
This was the scene Nov. 14, 2016 at the Natural Bridges State Park's Monarch Grove Butterfly Natural Preserve, Santa Cruz. They were overwintering 80 feet high in a eucalpytus tree. (Photo by Kathy Keatley Garvey)

This was the scene Nov. 14, 2016 at the Natural Bridges State Park's Monarch Grove Butterfly Natural Preserve, Santa Cruz. They were overwintering 80 feet high in a eucalpytus tree. (Photo by Kathy Keatley Garvey)

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...

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

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

A male monarch heads for another flower on tropical milkweed, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)
A male monarch heads for another flower on tropical milkweed, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

A male monarch heads for another flower on tropical milkweed, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Startled, a male monarch abruptly leaves a tropical milkweed blossom, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)
Startled, a male monarch abruptly leaves a tropical milkweed blossom, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Startled, a male monarch abruptly leaves a tropical milkweed blossom, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Monarchs nectaring on tropical milkweed, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)
Monarchs nectaring on tropical milkweed, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Monarchs nectaring on tropical milkweed, Asclepias curassavica, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

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...

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)
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)

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)

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...

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

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

Painted lady twists around for a better shot at the nectar. (Photo by Kathy Keatley Garvey)
Painted lady twists around for a better shot at the nectar. (Photo by Kathy Keatley Garvey)

Painted lady twists around for a better shot at the nectar. (Photo by Kathy Keatley Garvey)

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

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