1. 

   creekx spent spinner

   Joined:

   Mar 4, 2004

   Messages:

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   Location:

   Rancho Deluxe

   What is this mayfly they are calling a Gray Drake? To me they look like a different color phase of a March Brown (rhithrogena). I don't believe they are Gray Drakes (siphlonurus) which are typically July hatches.
   
   Any thoughts? (scroll down to the Gray Drake heading)
   
   https://www.silverbowflyshop.com/blog/spring-bugs/

    

   creekx, May 18, 2017

   #1
2. 

   Taxon Moderator Staff Member

   Joined:

   Aug 22, 2004

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   Location:

   Plano, TX

   Yes, I agree, probably Rhithrogena morrisoni.
   
   
   
   

    

   Taxon, May 18, 2017

   #2

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