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

Information about the 2019 BugGuide Gathering in Louisiana, July 25-27

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

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


TaxonomyBrowseInfoImagesLinksBooksData
Photo#1233775
Stationary mayfly - Callibaetis pictus

Stationary mayfly - Callibaetis pictus
Santa Cruz, Santa Cruz County, California, USA
June 5, 2016
Size: ~8mm excl. cerci
Mayfly has been stationary on my office wall for 24 hours now. Is this a subimago in its molting process? I suppose time will tell...

Moved
Moved from Mayflies.

Callibaetis pictus
Hi Andy-

I believe this female imago to be Callibaetis pictus.

Following mating, female imagoes of genera Callibaetis and Cloeon seek a safe place to remain stationary for five days or so, until their eggs have matured. Once their eggs are mature, the female imago flies off to land on the water, and deposit her load of eggs, which immediately start hatching.

This behavior is unique to genera Callibaetis and Cloeon, as the eggs of other mayfly genera require up to two weeks following oviposition to begin hatching.

Hope this adequately answers your question.

 
Thanks Roger, for the ID and
Thanks Roger, for the ID and the explanation. I actually found your website while briefly researching this subject, and was duly impressed. Thanks for your work

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