Another Entomological Question | High Sierra Topix  

Another Entomological Question

If you've been searching for the best source of information and stimulating discussion related to Spring/Summer/Fall backpacking, hiking and camping in the Sierra Nevada...look no further!
User avatar

Another Entomological Question

Postby bytwerk » Fri Aug 24, 2012 4:52 pm

Earlier this month we were at Pingree Lake in the Emigrant Wilderness. About 7:30 p.m. there was a high-pitched whine that sounded like a sick turbine or some sort of machinery. It lasted for about 45 minutes. It repeated each night about the same time.

On night two we figured it out. Looking up, about 20 feet above us, there were clouds of insects. I don't think they were mosquitos, since few of them troubled us.

I've not had a similar experience in years of hiking. What are the insects?
Last edited by bytwerk on Sat Aug 25, 2012 3:21 pm, edited 1 time in total.

User avatar
Topix Novice
Posts: 12
Joined: Mon Jun 08, 2009 4:29 pm
Location: Grand Rapids, Michigan
Experience: N/A

User avatar

Re: Another Etymological Question

Postby kpeter » Sat Aug 25, 2012 8:21 am

I can't answer you for sure but I have had similar experiences many times--including earlier this year at Many Islands Lake in northern Yosemite--so not too far from Emigrant at all. It also was at about 7:30 on the dot and lasted only 30-45 minutes. I would guess it was the same phenomenon we both saw.
Mayfly hatching-1.jpg
Mayfly hatching at Many Islands Lake

My best guess is that it was a mayfly hatching. It is easy to initially mistake them for mosquitoes--especially since their abdomens are striped like a mosquito, but they don't bite, don't have a proboscis, and have two distinctive threads on their tails. Mayflies always hatch all at once and live for only one or two days. Almost their whole lifecycle is in earlier stages, they are adults only briefly to reproduce.

Of course, it could be some other kind of hatching, too.
User avatar
Topix Expert
Posts: 550
Joined: Mon Jan 04, 2010 1:11 pm
Experience: N/A

Return to Backpacking / Hiking / Camping

Who is online

Users browsing this forum: Google Adsense [Bot], grains, SCandy and 5 guests