Date: 6/8/19 7:39 am
From: <t4c1x...>
Subject: [obol] Re: Common Nighthawk in Sherwood 6-5-2019
When I was in my teens I regularly saw Common Nighthawks flying around over Toledo, and also remember seeing them in Albany and Corvallis. I don't seem them in those locations any more, but as Lars pointed out, they can sometimes be seen around clearcuts. The logging landings provide nesting places and the open sky a place to feed. Their presence is such areas seems to last only three to five years following timber harvest. Probably by that time the landings have grown a cover of vegetation (often Himalayan blackberry or scotch broom) unsuitable for the nesting of nighthawks.

From: "larspernorgren" <larspernorgren...>
To: <freemanbecard...>
Cc: <gaviacooney...>, "obol" <obol...>
Sent: Saturday, June 8, 2019 4:29:40 AM
Subject: [obol] Re: Common Nighthawk in Sherwood 6-5-2019

An excellent post Jeff. While Obol subscribership is at an all time high(seemingly keeping stride one-to-one with the wolf population in Germany) contributions are perhaps at the lowest since l first subscribed twelve years ago. It's a great idea to master a new technology when the stakes are low. I recall Khan Trahn's advice on digoscoping: practice on Chickadees and Robins, don't wait and try to figure it out on your first Northern Parula.
The dawn song of Violet-green Swallows is for me the defining sound of summer in the American West. From Pine Ridge ,South Dakota to Cascade Head in Oregon they are twittering in the dark hours before sunrise. I used to assume they were all flying about and perhaps the twittering reduced the chance of collision. But someone on this list reported a decade ago that much of the vocalizing comes from perched swallows.
Right now is the absolute spike in nighthawk detections in western Oregon as they move through. The first birds appear around June 5. This is ten days later than eastern Oregon, a reverse of the case with Turkey Vultures and many other spring migrants. By June 15-20 CONI have reached their destination . The clearcuts around Timber Jct on Highway 26 had breeding nighthawks last year. Visit during darkness and you should be able to record their bullroaring. They make a dive like a Rufous Hummingbird and at the bottom do something with wing and/or tail feathers to acheive a bass toned buzzing. Lars

On Fri, Jun 7, 2019, 11:17 PM Roger Freeman < [ mailto:<freemanbecard...> | <freemanbecard...> ] > wrote:

Sounds like Violet-green Swallows along with the Common Nighthawk. Had a similar experience a few mornings ago when I stepped outside at about 4:15AM (1 hour before sunrise) with several active chattering VGSwallows flying around. I also recorded it.

Roger Freeman

On Fri, Jun 7, 2019 at 9:59 PM Jeff Cooney < [ mailto:<gaviacooney...> | <gaviacooney...> ] > wrote:


I attended my first OBA meeting this year. After attending the Saturday workshop presented by Nathan Pieplow, I was so excited about "earbirding", that I went home and installed the Song Sleuth app on my iPhone Xr. I had been hearing a twittering sound early in the morning between 3 and 5 AM that I suspected were vocalizations of Vaux's Swifts. I wanted to get a recording, so with Song Sleuth installed, I kept my window open and my iPhone beside the bed. On June 5th I got a recording of the swifts, but unexpectedly got a recording of a Common Nighthawk 'preenting' as a bonus.
I tried to edit the recording to isolate the nighthawk, but I fear I fumbled and did not get all I wanted. I have attached the remaining clip of the recording. Obviously I have much to learn about audio files, but as Nathan said a bad recording is better than no recording! It is a 3 second clip that is not very loud. Unfortunately, I did not understand the clip and save process on Song Sleuth and this all I have left of the original 1 minute 20 second recording.

You will have to turn up the volume to hear the twittering and preents in this recording. I checked Song Sleuth, but could not find Common Nighthawk. I also checked the bird lists I could find for Tualatin Valley Wildlife Refuge, but could not find a listing of Common Nighthawk. The Willamette Valley Birding Trail Checklist notes that nighthawks are rarely detected during Spring and Fall, and occasionally detected during summer.

So do you think the "twittering" sound I recorded are Vaux's Swifts and the "preent" sounds are from a Common Nighthawk?

I have lived in Sherwood since fall of 2016. This is the first time I have heard a Common Nighthawk on this side of the Cascades, however, they were fairly common in central Oregon.

I would welcome any feedback at: [ mailto:<gaviacooney...> | <gaviacooney...> ]

I hope I have not violated any OBOL rules by making this posting. If so, forgive me, it is my first post to this listserve.


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