The yellow drakes are out!

[troutphisher]

I had this fly into my house from the back porch. It was attracted to the porch light and flew in when I opened the door. These really are big flies, with a thick abdomen. The wings were not quite clear, they had a faded yellow tint, with black  markings.

[Bluetick1955]

Perhaps he was looking for water o-o

[quercus]

Been seeing those for a while gathered on a wall under a fluorescent light in the mornings while fueling our trucks.  Some of the largest mayflies i've seen.