Will, The call faded in about 15 minutes before sunset. Cottonwood Spring i=
s in a canyon, so the sun had disappeared behind peaks some time before.
Martyn, all three swallows are listed as common there. I listened to BirdJa=
m samples of the three swallows and the swift and the swift was closest to =
my ear.
As the night went on the repetition rate slowed down and sometimes went int=
o a =93missing cylinder=94 rhythm. Sometimes a loud noise, like a Raven cra=
shing into a dried palm-frond roost, would cause it to call with renewed vi=
gor. Why is the call continuous? Is it echolocating? The sample is when it =
was closest to the microphones. Irritating to listen to, like a car alarm! =
Maybe it stuns or confuses insects.
-Dan
> On Apr 17, 2019, at 9:50 AM, Wilbur Hershberger [n=
aturerecordists] <> wrote:
>
>
>
> Dan,
> Sounds a bit like a White-throated Swift to me. How long after sunset was=
this recording made?
>
>
> Wil Hershberger
> Nature Images and Sounds, LLC <http://www.natureimagesandsounds.com/>
> Hedgesville, WV
> The Songs of Insects <http://www.songsofinsects.com/>
>
>
>> On Apr 17, 2019, at 12:24 PM, Dan Dugan <=
dugan.com> [naturerecordists] < <nat=
>> wrote:
>>
>> This critter was chattering all night at Joshua Tree. First I thought it=
was a frog, then maybe a squirrel scolding my windscreens.. But those don=
=92t fly around. Too low for a bat. That leaves bird. It would go on for lo=
ng sessions.
>>
>>
>> http://soundcloud.com/user7860487/ns190414-05-23-21-jotr-cs <http://soun=
dcloud.com/user7860487/ns190414-05-23-21-jotr-cs>
>>
>>
>>
>
>
>
>
|