Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29


Previous events
TaxonomyBrowseInfoImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Aschiza" » Hover Flies (Syrphidae) » Syrphinae » Syrphini » Toxomerus » Toxomerus marginatus
Photo#374638
Toxomerus - Toxomerus marginatus - male - female
Copyright © 2010 Aaron Schusteff

Toxomerus - Toxomerus marginatus - Male Female
Waddell Creek, Big Basin Redwoods State Park, Santa Cruz County, California, USA
August 23, 2009
Mating pair. Note the sexual dimorphism in relative size and separation of the eyes (male on top, female on bottom).

I'm pretty sure these are Toxomerus marginatus, based on other photos and Martin's simplified key.

Photographed in riparian corridor of Waddell Creek, near mouth of creek and a few hundred yards from the Pacific Ocean.

Images of this individual: tag all
Toxomerus - Toxomerus marginatus - male - female Toxmerus - Toxomerus marginatus - male - female Toxomerus - Toxomerus marginatus - male - female
tag · login or register to post comments
Contributed by Aaron Schusteff on 4 March, 2010 - 1:08am
Last updated 4 March, 2010 - 8:58pm

Moved
Moved from Syrphid Flies.
… Aaron Schusteff, 4 March, 2010 - 8:58pm login or register to post comments

Good eye. Toxomerus marginatus
Male is lightly marked, but the dot at the far end of the abdomen is all it takes to ID him.
… Ron Hemberger, 4 March, 2010 - 1:54am login or register to post comments

 
Thanks for the Confirmation Ron
I'll pay more attention to that dot in the future. I was mainly going by the yellowish "margin" along the dorsal edge of the abdomen, the overall pattern of the abdominal markings, and the yellow legs.
… Aaron Schusteff, 4 March, 2010 - 8:57pm login or register to post comments

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact