Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
was sparse and shrubby strawly
plants took over. It was in a sort
of chaparral community. The Clarke
Pitvachers frequented only the
higher, cooler points and ridges.
Those I saw were either at the
ecotone of Pinyon-Mt. Mahogany or
were in high pure stands of [
Mahogany.] The Mt. Chickadees
were present only in small numbers
in the pinyon woodland, irrespective
of the denseness or physiognomy of
the trees. Robins were most
common in the bottoms and canyons
where moist spots were found, but
utilized the Pinyon for digging
posts and as resting places while
travelling from one feeding place to
another. They did not forage in
the pinyon.
The Mountain Bluebirds were present in
small numbers on the higher ridges, but
foraged into the canyons too.
The two Solitary Vireos seen were both
singing in the pinyon woodland, as
were the Black-throated Gray Warblers.
The Macgillivray Warblers were strict
indicators of the canyon floor where
thickets of Rosa and Amelanchier with
willows grew near water holes. All of
the Audubon Warblers preferred the