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) » Mayflies (Ephemeroptera) » Furcatergalia » Pannota » Caenoidea » Small Squaregilled Mayflies (Caenidae) » Caenis
Photo#45094
Small Squaregill Mayfly - Caenis - male
Copyright © 2006 Tony DiTerlizzi

Small Squaregill Mayfly - Caenis - Male
Hampshire County, Massachusetts, USA
May 29, 2005
Hundreds of these tiny mayflies were attracted to our back porch lights. ID based on others in the guide.
tag · login or register to post comments
Contributed by Tony DiTerlizzi on 16 March, 2006 - 10:31pm
Last updated 23 February, 2009 - 6:47pm

Male imago
Eye size is of no help in determining gender in Caenis, but the long tails distinguish the males. The male abdomen is usually paler and slightly more slender than the female abdomen. The malformed right wing of this specimen is an interesting anomaly.
… Lloyd Gonzales, 28 August, 2008 - 2:46pm 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