Dont Tread On Me: Sensitive Species Avoidance Len Liu PRBO - - PDF document

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Dont Tread On Me: Sensitive Species Avoidance Len Liu PRBO - - PDF document

Feb 01, 2024 112 likes •170 views

Dont Tread On Me: Sensitive Species Avoidance Len Liu PRBO Conservation Science May 1, 2011 Generally... High tides=less refugia Higher vegetation and larger clumps=better nest substrate and refugia Vegetation

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Don’t Tread On Me: Sensitive Species Avoidance

Len Liu PRBO Conservation Science May 1, 2011

Generally...

  • High tides=less refugia
  • Higher vegetation and larger clumps=better

nest substrate and refugia

  • Vegetation complexity=higher probability of

nesting

  • Stay on paths; high step like in snow to

minimize vegetation trampling

  • Most birds don’t nest on bare ground
  • Be aware of birds flushing from vegetation–

possible nest, try a different route

  • Disturbed birds that stick around may be

guarding a nest or young nearby

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Clapper Rail

Often nest near channels Nest preference: 1st and 2nd order channels Distress calls: squawk and screech

Black Rail

More likely at higher elevations and away from channels Nest substrate varies Upright flight posture Distress call: Grr-grr-grrr

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Common Yellowthroat

  • Prefers taller

vegetation with high complexity

  • Nest is fairly low,

very well concealed

  • Distress note is a

hard tschip

Song Sparrow

  • Nests in vegetation slightly to

moderately taller than surroundings

  • Nest is usually low, but

higher in taller vegetation

  • Distress calls: “bark”; soft

“tsip” to silence nestlings

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Salt marsh harvest mouse

  • dependent on dense cover
  • preferred habitat is pickleweed
  • nest is commonly a ball of vegetation

that is on the ground or up in pickleweed

  • seldom found in cordgrass or alkali

bulrush

  • use transition zone and to escape the

higher high tides

Find Her!

They don’t want to be found. They usually will let you know if you have found them.

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Vocalizations

Clapper Rail http://www.xeno-canto.org/browse.php?query=clapper+rail Screech call: Catalog #XC70045 Black Rail http://www.xeno-canto.org/XCspeciesprofiles.php?species_nr2=544.00 Grr-grr-grr call: Catalog #s XC1145, XC16582 and XC20560 Common Yellowthroat http://www.allaboutbirds.org/guide/Common_Yellowthroat/sounds Song Sparrow http://www.allaboutbirds.org/guide/Song_Sparrow/sounds http://www.xeno-canto.org/browse.php?query=melospiza+melodia Chip call: Catalog #s XC35902