Interesting, Dan
Birds don=92t echolocate like bats, I believe they are communication calls =
as they generally flock together, I=92ve heard them constantly call to each=
other on the wing.
Like the missus talking all the time when I=92m trying to concentrate on do=
ing something.
Martyn
Www.Naturesound.org
Sent from my iPhone
Please excuse my spelling on this tiny keyboard.
> On Apr 17, 2019, at 2:18 PM, Dan Dugan [naturerecordists=
] <> wrote:
>
> Will, The call faded in about 15 minutes before sunset. Cottonwood Spring=
is 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 Bird=
Jam samples of the three swallows and the swift and the swift was closest t=
o my ear.
>
> As the night went on the repetition rate slowed down and sometimes went i=
nto a =93missing cylinder=94 rhythm. Sometimes a loud noise, like a Raven c=
rashing into a dried palm-frond roost, would cause it to call with renewed =
vigor. Why is the call continuous? Is it echolocating? The sample is when i=
t 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 [=
naturerecordists] <> wrote:
>>
>>
>>
>> Dan,
>> Sounds a bit like a White-throated Swift to me. How long after sunset wa=
s this recording made?
>>
>>
>> Wil Hershberger
>> Nature Images and Sounds, LLC
>> Hedgesville, WV
>> The Songs of Insects
>>
>>
>>> On Apr 17, 2019, at 12:24 PM, Dan Dugan [naturerecordi=
sts] <> wrote:
>>>
>>> This critter was chattering all night at Joshua Tree. First I thought i=
t 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
>>>
>>>
>>>
>>
>>
>>
>
>
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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