Posts Tagged: dragonflies
Gotta love those dragonflies in the family Libellulidae.
The Thunderbirds of the insect world, they perform amazing aerial maneuvers as they skim over water, catching mosquitoes, knats, flies and other undesirables on the wing.
But oh--occasionally they nail a pollinator.
A red flame skimmer (Libellula saturata) skimmed over our fish pond and pool last Saturday and picked on the pollinators. Well, at least one pollinator.
It grabbed a female sweat bee, of the genus Halictus, probably H. tripartitus (as identified by native pollinator specialist Robbin Thorp, emeritus professor of entomology at the University of California, Davis, and Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology at UC Davis).
Yes, they can even identify a mangled sweat bee in the mouth of a dragonfly.
And no sweat bee.
Flame skimmer munches on a female sweat bee of the genus Halictus. (Photo by Kathy Keatley Garvey)
Flame skimmer is long and lean with huge compound eyes. (Photo by Kathy Keatley Garvey)
Some folks wear their heart on their sleeve.
Others wear a dragonfly on their chest.
As part of its public outreach education program and to showcase the world of insects, the Bohart Museum of Entomology at the
The t-shirt, designed by entomology doctoral candidate Fran Keller, features the white-belted ringtail, also known as a gomphid dragonfly, from the family Gomphidae.
UC Davis undergraduate student William Yuen, a part-time employee at the Bohart, traced the insect from a photo taken by
The dragonfly also appears on the Bohart’s “California Dragonfly Poster,” the work of Keller and Kareofelas.
“William is an excellent artist, a brilliant student, a hard worker and has worked in the museum for two years,” said Keller. “I wanted to immortalize him and his talent and for his contributions to the museum.”
“This drawing is so precise you could identify this dragonfly by its wing venation,” Keller said. The insect order (Odonata), family, species name and common name appear beneath the wing.
Keller said more than 5000 species of dragonflies exist worldwide. “Dragonflies don’t harm people; they don’t bite or sting,” she said.
What else about dragonflies?
- Female dragonflies lay their eggs in or near water.
- They beat their wings about 30 beats per second (bps), compared to a honey bee’s 300 bps
- In both their larval and adult stages, dragonflies eat mosquitoes. The larvae eat mosquito nymphs and other insects. As adults, they grab mosquitoes and other insects in mid-air.
Proceeds will benefit the Bohart’s insect outreach education program. The museum, directed by entomologist Lynn Kimsey, chair of the Department of Entomology, is home to more than seven million specimens.
For more information, see http://bohart.ucdavis.edu/ or contact the museum at (530) 752-0493.
William Yuen wearing dragonfly t-shirt
White-belted ringtail dragonfly
Sympetrum by Fran Keller