Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
SP Myers
1976
Calidris melanotos
GRID 2
30 June
see Journal. next one met has hatched, probably today.
1 July
Typical hoot today except over 4 w/ chicks ?? Ø had been harassing here, + then feeding
nearby. Shot precum on mound, then took off into the wind, circled around, + looked
stop here
[Diagram: hand-drawn sketch with labels including "wind from W", "position of 4", "storking position of 3", "flap", "soar", "pump", "flap", "soar", "flap"]
After the pumping stroke during the terminal portion of the hoot—the male soars, turning from
into the wind — , often describing a large circle as
reflected in the diagram above, landing very near the point of take off, occasionally frequently
precisely on the same mound, but occasionally shifting this focus of attention to another area.
During the soaring motion the tail is fanned and appears to function significantly in
steering, as it is shifted about the bird's longitudinal axis, changes angle w.r.t. to
current horizontal.
2 July
Clear flight of 8 after a high bird exhibits sustained power flight — . The bird ascends up to
50–70 meter height, flies beyond the territory borders, then begins sweeping an arc about, often
sliding, and returns to the territory. The 8 which I followed this a.m. is not
a good hooter. Its voice is higher, unsure—missing notes when from its anatomy I would
expect it to hoot. FAP would call this a 1st year bird, part of the 3rd week of June wave.
But is it? The resident Ø here has been absent for several days, or at least we have
not been able to find it. An equally plausible hypothesis is that the same individual has
returned after a brief trip, during which its prental sac — [illegible] — began to
“recede.” Ah for some banded birds. The bird is cruising over an area fairly similar to old bird
i.e., here
except that it is definitely expanded. This Ø’s prefrontal sac is dark + well developed — [illegible]