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

Posts Tagged: monarch caterpillar

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

The Making of a Monarch

A monarch butterfly on a Mexican sunflower (Tithonia). Monarch puppets are available at the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)

If you're addicted to monarchs--and lament that they're overwintering in coastal California and in central Mexico and nowhere near you--no worries. The Bohart Museum of Entomology, University of California, Davis, has butterflies in its gift shop that...

A monarch butterfly on a Mexican sunflower (Tithonia). Monarch puppets are available at the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)
A monarch butterfly on a Mexican sunflower (Tithonia). Monarch puppets are available at the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)

A monarch butterfly on a Mexican sunflower (Tithonia). Monarch puppets are available at the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)

Monarch t-shirts at the Bohart Museum of Entomology ask the question:
Monarch t-shirts at the Bohart Museum of Entomology ask the question: "Got milkweed?" Milkweed is the host plant of monarchs; monarchs lay their eggs only on milkweed and caterpillars eat only milkweed. (Photo by Kathy Keatley Garvey)

Monarch t-shirts at the Bohart Museum of Entomology ask the question: "Got milkweed?" Milkweed is the host plant of monarchs; monarchs lay their eggs only on milkweed and caterpillars eat only milkweed. (Photo by Kathy Keatley Garvey)

Posted on Monday, November 28, 2016 at 3:23 PM

The Saga of the Milkweed, Bee and Caterpillar

A tattered honey bee seeking nectar from a milkweed blossom encounters a monarch caterpillar. (Photo by Kathy Keatley Garvey)

So here's this tattered old worker bee seeking some nectar from the broadleaf milkweed, Asclepias speciosa. She looks as if she's not only been around the block a few times but around the county several dozen times. Her wings look too ragged to support...

A tattered honey bee seeking nectar from a milkweed blossom encounters a monarch caterpillar. (Photo by Kathy Keatley Garvey)
A tattered honey bee seeking nectar from a milkweed blossom encounters a monarch caterpillar. (Photo by Kathy Keatley Garvey)

A tattered honey bee seeking nectar from a milkweed blossom encounters a monarch caterpillar. (Photo by Kathy Keatley Garvey)


"Well, hello, there!" The antennae of the bee and monarch caterpillar touch. (Photo by Kathy Keatley Garvey)

"Well, hello, there!" The antennae of the bee and monarch caterpillar touch. (Photo by Kathy Keatley Garvey)

A honey bee gets stuck in the sticky pollinia of the milkweed as a monarch caterpillar keeps munching away. (Photo by Kathy Keatley Garvey)
A honey bee gets stuck in the sticky pollinia of the milkweed as a monarch caterpillar keeps munching away. (Photo by Kathy Keatley Garvey)

A honey bee gets stuck in the sticky pollinia of the milkweed as a monarch caterpillar keeps munching away. (Photo by Kathy Keatley Garvey)

Honey bee carries the sticky winged pollen on her leg as she buzzes off. (Photo by Kathy Keatley Garvey)
Honey bee carries the sticky winged pollen on her leg as she buzzes off. (Photo by Kathy Keatley Garvey)

Honey bee carries the sticky winged pollen on her leg as she buzzes off. (Photo by Kathy Keatley Garvey)

Posted on Monday, July 18, 2016 at 4:56 PM

Happy Father's Day!

A monarch caterpillar chewing on a narrow-leafed milkweed. (Photo by Kathy Keatley Garvey)

Where have you been? For the last several weeks, we've been watching for signs of the first seasonal monarch caterpillar on our narrow-leafed milkweed. The lush leaves refused to yield any secrets. They looked untouched, undisturbed and intact. But on...

A monarch caterpillar chewing on a narrow-leafed milkweed. (Photo by Kathy Keatley Garvey)
A monarch caterpillar chewing on a narrow-leafed milkweed. (Photo by Kathy Keatley Garvey)

A monarch caterpillar chewing on a narrow-leafed milkweed. (Photo by Kathy Keatley Garvey)

A male monarch butterfly on a Mexican sunflower (Tithonia). How can you tell it's a male? Note the distinguishable black spot on each hind wing. (Photo by Kathy Keatley Garvey)
A male monarch butterfly on a Mexican sunflower (Tithonia). How can you tell it's a male? Note the distinguishable black spot on each hind wing. (Photo by Kathy Keatley Garvey)

A male monarch butterfly on a Mexican sunflower (Tithonia). How can you tell it's a male? Note the distinguishable black spot on each hind wing. (Photo by Kathy Keatley Garvey)

A female monarch butterfly on lavender. Note the absence of the black spots on the hind wings. (Photo by Kathy Keatley Garvey)
A female monarch butterfly on lavender. Note the absence of the black spots on the hind wings. (Photo by Kathy Keatley Garvey)

A female monarch butterfly on lavender. Note the absence of the black spots on the hind wings. (Photo by Kathy Keatley Garvey)

Posted on Friday, June 17, 2016 at 2:55 PM
 
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