Boidnoise

Various nature recordings by Bernhard Kroeger

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  • July 23, 2007, hunting for owls above Nevada City, CA I heard this raspy, screechy noise near Rock Creek.  The time was twenty minutes before midnight.  I was perplexed by the call, but figured it might be an owl of some kind and recorded it.  Doing some research afterward I found out that this is a begging call for the great-horned owl.  Another mystery night sound solved.

    This file is 00:01:08 long and contains four calls.  Background is running water and crickets.

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    Here are aother four calls from the same bird in the same location 20 minutes later.

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  • I drove to 

    Olema Marsh before dawn on Sunday February 7, 2009 to see what birds and animals might be active in the area. Even at that time there was quite a bit of traffic on both Bear Valley Rd. and Sir Francis Drake Blvd.   Not long after light Virginia rails started vocalizing, along with marsh wrens, song sparrows, crows, ravens, jungle fowl (roosters) and others.  The recording is 00:05:39 long, and the loudest portions are the Virginia rails.  Traffic noise is present off and on.

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    Another segment of the Virgiania rails with a great-horned owl in the background.

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  • Recorded on the morning of February 8, 2009 at Limantour Beach at Point Reyes National Seashore.  Two Ravens flew into a pine and I recorded their croaky calls from a distance.  When I heard the clucking calls I moved closer and recorded almost directly under the tree.  One of the birds was quietly preening as the other was vocalizing.  There must be some bill snapping associated with making the clucking noises, as little clicking sounds can also be heard.  White-crowned sparrows can be heard in the background along with the surf over the dunes behind me.

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  • Chipping sparrows migrate through the foothills on the way to higher elevations in the Sierra Nevada.  On the morning of April 17, 20007 I heard what I took to be an insect of some kind, but it turned out to be a sparrow perched on the top of a young oak tree with his head and wide open bill pointed at the sky broadcasting the following enthusiastically.

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    What do I consider to be

    Upper Bridgeport SP ??

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  • The California towhee is a common bird in our area.  Most of the year one can hear it’s sharp “pink” call, but in the spring one can hear its song. Recorded at upper Bridgeport State Park in Nevada County, CA.

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  • Black phoebes are flycatchers that prefer the presence of water.  They will be seen perched either high or low, dart out after an insect, and often return to the same perch.  With their toxedo clad appearance they are easy to recognize and their high pitched “ptee” call is hard to miss.  Note that this bird alternated each call ending with first an upslur and the next call with a downslur.  April 17, 2007

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  • Early in the morning on April 17, 2007 at the upper part of Bridgeport State Park in Nevada County, CA I heard the irritated stuttering call of a Bullock’s oriole.  It was sitting near the top of an oak tree and I got this recording of it.  The call one will hear or become aware of most often is at 22 seconds.

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  • Most of us have heard the “Chicago” call of the california quail perched on the top of a fencepost or bush.  You may have wandered through oak scrubland that has thick cover either as bushes or blackberry thickets and heard mysterious liquid, clicking “putting” noises and been mystified.  These are also vocalizations of the California quail.  I was able to record an extensive quail session in one of these thickets at the upper part of Bridgeport SP in Nevada County, CA on the morning of April 17, 2007.

    In the background one can hear in the order of appearance: mourning dove, wrentit, western kingbird, Bullock’s oriole, golden-crowned sparrow, and lesser goldfinch

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  • Acorn woodpeckers are common and sociable oak woodland birds in the Sierra foothills.  They are easily recognized by their clown-like faces and raucus calls.  In your wanderings you may have seen dead trees covered with holes that contain acorns.  These are called larder trees, and are the acorn woodpecker’s granary.  A breeding group of numerous individuals will cooperate in it’s creation and defense.

    This bird was recorded at the upper part of Bridgeport State Park along the Yuba River in Nevada County on April 17, 2007.  What you hear is the typical short, gutteral call.  Also present is the call of a  Bewick’s wren (Thryomanes bewickii).

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  • This owl woke me on the evening of January 8, 2009.  It was calling loudly, and I had never heard a 6 note call from a great-horned owl before, only 4 note and 5 note.  I hurried, threw on a coat, and went on the deck with my recording gear and was able to get a series of calls before the owl quit or moved on.  The recording was made at my home on Banner Mountain, near Nevada City, CA.

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