Cooperative Extension San Joaquin County
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Cooperative Extension San Joaquin County

Posts Tagged: hover fly

The Frit and the Fly: Who Wins?

The syrphid fly tries to seek some nectar, but the Gulf Fritillary proclaims

The Frit and the fly...or the butterfly and the fly... That would be the Gulf Fritillary (Agraulis vanillae) and the syrphid fly (family Syrphidae), aka flower fly or hover fly. They meet on a beautiful autumn day on an equally beautiful...

The syrphid fly tries to seek some nectar, but the Gulf Fritillary proclaims
The syrphid fly tries to seek some nectar, but the Gulf Fritillary proclaims "This Mexican sunflower is occupied." (Photo by Kathy Keatley Garvey)

The syrphid fly tries to seek some nectar, but the Gulf Fritillary proclaims "This Mexican sunflower is occupied." (Photo by Kathy Keatley Garvey)

The butterfly begins to spread its wings as the syrphid edges closer to the nectar. (Photo by Kathy Keatley Garvey)
The butterfly begins to spread its wings as the syrphid edges closer to the nectar. (Photo by Kathy Keatley Garvey)

The butterfly begins to spread its wings as the syrphid edges closer to the nectar. (Photo by Kathy Keatley Garvey)

The butterfly spreads and flattens its wings. The syrphid does not move. (Photo by Kathy Keatley Garvey)
The butterfly spreads and flattens its wings. The syrphid does not move. (Photo by Kathy Keatley Garvey)

The butterfly spreads and flattens its wings. The syrphid does not move. (Photo by Kathy Keatley Garvey)


"Maybe if come around from a different direction!" the fly seems to say. (Photo by Kathy Keatley Garvey)

"Maybe if come around from a different direction!" the fly seems to say. (Photo by Kathy Keatley Garvey)


"Ah, all mine!" proclaims the fly. "I scared off the butterfly." (Photo by Kathy Keatley Garvey)

"Ah, all mine!" proclaims the fly. "I scared off the butterfly." (Photo by Kathy Keatley Garvey)

Posted on Monday, November 5, 2018 at 5:00 PM

A Fly, Oh, My!

A female Eristalis stipator (as identified by Martin Hauser of the California Department of Food and Agriculture, foraging on tropical milkweed. (Photo by Kathy Keatley Garvey)

A fly, oh, my! On the approval scale, they don't rank nearly as high as honey bees, but some are often mistaken for them. Take the Eristalis stipator, which belongs to the family Syrphidae, the hover flies. It's about the same size as a honey bee and...

A female Eristalis stipator (as identified by Martin Hauser of the California Department of Food and Agriculture, foraging on tropical milkweed. (Photo by Kathy Keatley Garvey)
A female Eristalis stipator (as identified by Martin Hauser of the California Department of Food and Agriculture, foraging on tropical milkweed. (Photo by Kathy Keatley Garvey)

A female Eristalis stipator (as identified by Martin Hauser of the California Department of Food and Agriculture, foraging on tropical milkweed. (Photo by Kathy Keatley Garvey)

The female Eristalis stipator peers at the photographer. (Photo by Kathy Keatley Garvey)
The female Eristalis stipator peers at the photographer. (Photo by Kathy Keatley Garvey)

The female Eristalis stipator peers at the photographer. (Photo by Kathy Keatley Garvey)

Eristalis stipator in flight. (Photo by Kathy Keatley Garvey)
Eristalis stipator in flight. (Photo by Kathy Keatley Garvey)

Eristalis stipator in flight. (Photo by Kathy Keatley Garvey)

See you! Off flies Eristalis stipator, heading for another blossom. (Photo by Kathy Keatley Garvey)
See you! Off flies Eristalis stipator, heading for another blossom. (Photo by Kathy Keatley Garvey)

See you! Off flies Eristalis stipator, heading for another blossom. (Photo by Kathy Keatley Garvey)

Posted on Wednesday, August 16, 2017 at 5:12 PM

Do 'Cats Eat Other 'Cats? Do Larva Eat Other Larva?

A lady beetle larva attacking and eating a syrphid fly larva. (Photo by Kathy Keatley Garvey)

It's a dog-eat-dog world out there. It's also a 'cat-eat-'cat world, that is, when a caterpillar eats another caterpillar. Or in this case, when larva eats larva. We recently spotted this lady beetle larva eating a syrphid fly larva on our yellow rose...

A lady beetle larva attacking and eating a syrphid fly larva. (Photo by Kathy Keatley Garvey)
A lady beetle larva attacking and eating a syrphid fly larva. (Photo by Kathy Keatley Garvey)

A lady beetle larva attacking and eating a syrphid fly larva. (Photo by Kathy Keatley Garvey)

The lady beetle larva (first photo) grew to an adult like this one. This is an Asian lady beetle. Regarding cannibalism, monarch caterpillars can and do eat one another. (Photo by Kathy Keatley Garvey)
The lady beetle larva (first photo) grew to an adult like this one. This is an Asian lady beetle. Regarding cannibalism, monarch caterpillars can and do eat one another. (Photo by Kathy Keatley Garvey)

The lady beetle larva (first photo) grew to an adult like this one. This is an Asian lady beetle. Regarding cannibalism, monarch caterpillars can and do eat one another. (Photo by Kathy Keatley Garvey)

Posted on Monday, June 5, 2017 at 4:54 PM

Jupiter's Beard Makes the Cut

A honey bee foraging on Jupiter's Beard. (Photo by Kathy Keatley Garvey)

Clean-shaven it's not. Yet it's a cut above. For bees, syrphids and butterflies, the long-blooming Jupiter's Beard make the cut. Centranthus ruber, also known as Jupiter's Beard, Red Valerian, Kiss-Me-Quick, and Keys to Heaven, is a popular...

A honey bee foraging on Jupiter's Beard. (Photo by Kathy Keatley Garvey)
A honey bee foraging on Jupiter's Beard. (Photo by Kathy Keatley Garvey)

A honey bee foraging on Jupiter's Beard. (Photo by Kathy Keatley Garvey)

A honey bee sipping nectar from Jupiter's Beard. (Photo by Kathy Keatley Garvey)
A honey bee sipping nectar from Jupiter's Beard. (Photo by Kathy Keatley Garvey)

A honey bee sipping nectar from Jupiter's Beard. (Photo by Kathy Keatley Garvey)

A syrphid, also known as a hover fly or flower fly, hovering over Jupiter's Beard. Flies are pollinators, too! (Photo by Kathy Keatley Garvey)
A syrphid, also known as a hover fly or flower fly, hovering over Jupiter's Beard. Flies are pollinators, too! (Photo by Kathy Keatley Garvey)

A syrphid, also known as a hover fly or flower fly, hovering over Jupiter's Beard. Flies are pollinators, too! (Photo by Kathy Keatley Garvey)

A syrphid, aka hover fly or flower fly, sipping nectar from Jupiter's Beard. (Photo by Kathy Keatley Garvey)
A syrphid, aka hover fly or flower fly, sipping nectar from Jupiter's Beard. (Photo by Kathy Keatley Garvey)

A syrphid, aka hover fly or flower fly, sipping nectar from Jupiter's Beard. (Photo by Kathy Keatley Garvey)

Posted on Friday, April 8, 2016 at 5:45 PM

Why Flies Are Pollinators, Too!

A  bee fly, genus Villa, collecting pollen on a Mexican sunflower (Tithonia). (Photo by Kathy Keatley Garvey)

Will all the pollinators please stand up! Or do a fly-by like the Blue Angels or a crawl-by like babies competing in a diaper derby. Bees--there are more than 4000 of them in North America--are the main pollinators, but don't overlook butterflies,...

A  bee fly, genus Villa, collecting pollen on a Mexican sunflower (Tithonia). (Photo by Kathy Keatley Garvey)
A bee fly, genus Villa, collecting pollen on a Mexican sunflower (Tithonia). (Photo by Kathy Keatley Garvey)

A bee fly, genus Villa, collecting pollen on a Mexican sunflower (Tithonia). (Photo by Kathy Keatley Garvey)

Honey bee (left) and a syrphid fly, aka hover fly or flower fly, sharing a Tithonia. (Photo by Kathy Keatley Garvey)
Honey bee (left) and a syrphid fly, aka hover fly or flower fly, sharing a Tithonia. (Photo by Kathy Keatley Garvey)

Honey bee (left) and a syrphid fly, aka hover fly or flower fly, sharing a Tithonia. (Photo by Kathy Keatley Garvey)

Posted on Wednesday, October 7, 2015 at 6:57 PM

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