Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Holmes, R.
1963
C. alpina
4
2 june Barrow, Alaska
In aerial display, bird here as rapidly
beating wings, giving churring or crower
note - then breaks with the loud, rising,
descending - in-potd hill & u-drag so,
Then loses altitude, then when crown
resumes, he angles up & gains
altitude to about 50' - The pulse
chops, etc... When beating wings are
held near the ventral for about one
second.
In one case, two 8" - well (fled)
about 3i years - one studied
tool flight - (aph 5") - sit wing,
sliding into area of another & giving,
The loud call - The tool flight
In second case, trailing seemed
the main call given by the appear.
3 june Only bird seen along this part 1 wolves
were 2 that were chasing at the
mount wolves club - They flew off to the
south along the bluff & did not return
to first area - is nomadic. These note
was an irregular sharp creases -
The loud field where became abrupt
up-pitch while the birds were in flight.
A flock (6-8) seen halfway to
Ooligah (1km (weld)) + at the junction/