Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Willet
R.E. Johnson
1967
April 8 Santa Barbara, California (cont.)
at the distant feeding location almost as if they
could see a specific food item at a distance & even
before it is [illegible] uncovered by the tide. They often turn
their backs on the water & probe seemingly oblivious
of the threat of the waves. Perhaps this only is
true when the waves are small (mean 1ft, high,
max 1/2 ft).
Facing toward shore may facilitate rapid escape when
the water rushes in. Considerable feeding is done
while running in with the tide. A typical foraging
route involves a rapid dash out with the receding
water line and follow by feeding, a series of rapid
retreats punctuated by short probing periods. The birds
appear to have an uncanny ability to estimate the
depth of the water & its rate et al. of movement so they
never get hit by a wave even though they do not
face it. Perhaps tactile receptors in the feet or legs
supply information as to movement rate & depth? allowing
accurate estimates & predictions of the advance of
each wave.