Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
American Egret
R.E. Johnson
1967
March 19 Stinson Beach, Marin Co., California - waterways next to
exposed mudflats (low tide) north of Stinson Beach. Warm,
sunny, partially cloudy. 2-3 PM. Many (12 within
200 yds of me) scattered over margins of mud flats.
Walk slowly, usually not wading very deep considering
their leg length, with neck sometimes held nearly
verticle like a sentinel. Stand with neck in "S"
+ bill tilted downward + then make quick stab
with bill. Appear quite efficient, ie each stab
appears to result in food capture + a swallow.
+ Feed
Frequently waded in shallow water containing greenish
seaweed, yet don't seem to get food entangled
with seaweed (in contrast to Blue Heron). Feeds at
more rapid rate than Heron. In 10 minutes it
stabbed 24 times while slowly walking along. (at least
"stabs"
one of these did not appear to result in a swallow,
howerer). During this time it moved slowly
back & forth over the same small (20 ft^2)
shallow (3-4 inches) area of seaweed laden
water. Once a shining, wiggling object was seen
caught (fish?). Once the bird spotted food to
the side after having planted his feet in
another direction - he stabbed while (returned
crosslegged body)
rather than moving feet.
See Great Blue Heron for notes on walking.
The only apparent difference is that the egret's
head bobs more with each step & it also feeds +
walks more so that its head & neck are