Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Holmes,T.
1963
C. pusillus
2 June Barrow, Alaska
The ground.
The occurred four times ~ about 3
minutes. From a 8' pectual closer
and the displays at N end 9 The
above sequence - but both eventually
landed me and other sedge feeding.
4 June Overhead displaying in drum area
5 June Britton's Area - at least two displaying Sound towers -
I chase between them notice - The aggressor gave
a harsh dry chatter (or unembodied) which was
lower in pitch than the aerial churning.
While churning, the pitch is usually even but
is broken by "breath-taking" - cad sequence
runs about 15-30 sec. - the c pause 1/2 - 1 sec -
The hill then resumes. The whole performance
may go to 5 min, usually not more than 2 1/2-3 min.
However, during the churning, the pitch occurs.
gives up for brief scenes - then drops back
to an unobtrusive long hill. - While say.
May be seen from ground, from perch a
"telephone" wire (see today) or for hovering
position.
Bluff above Volmerel. E. road. at end 1 former
towers. - 2 birds seen - on ground about 10' apart
each feeding - one suddenly flew up, circled &
landed near the other. Then both went into