Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
MacLean
1965
Calidris alpina
10 June Two birds feeding together near
South end of Beach Ridge. Groups
of 5, 2 proceeding E. along edge of
Wolb slog Slough, all feeding actively.
11 June Saw 2 feeding in low polygonal
area around Steven's Plots, W. of
micro-wet. Others in area. Heard first
song in brief bursts of ca. 3 sec..
12 June Encountered 4 seemingly dispersed
and territorial birds S. of CDEElwaniger-
observes first raised wing displays and
grounds chasing. Moving E. along
Wolb slog Slough, encountered two groups
of 5-9 - eventually joined with others
at mouth of Slough to -> flock of
25. Feeding actively. Feeding motion:
moving with "exploratory" jobs into litter
in series of 3-8; ca. 10-12 series/30 sec.
Occasionally 2 top and job (often deeper)
attentively at one spot for up to 1 1/4 min.
Series seem to break down at these times.
13 June Easily outnumber all other shorebirds
combines at this point. Birds are dispersing
and setting up territories. Aerial displays
and chases frequent. Occures irregularly
around W. Beach Ridge and low polygonal
grounds west. Several seemingly
territorial birds on Gasline Ridge. Flock