Geoscience Reference
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Figure 7-21.
Selection of shorebirds seen at Quivira
National Wildlife Refuge, Kansas, United States.
Black-necked stilt (
Himantopus mexicanus
) lower
center; American avocets (
Recurvirostra americana
)
upper left; snowy egrets (
Egretta thula
) upper right.
Photograph by J.S. Aber.
Figure 7-19.
Least bittern (
Ixobrychus exilis
) nest.
A. Nest suspended and hidden among emergent
vegetation. B. Least bittern defending the nest. Photos
courtesy of S. Acosta; Squaw Creek National Wildlife
Refuge, Missouri, United States.
Figure 7-22.
Black-necked stilt (
Himantopus
mexicanus
) wades in a shallow, saline marsh at Russell
Lakes State Wildlife Area, San Luis Valley, Colorado,
United States. Photo by J.S. Aber.
Figure 7-20.
Great blue heron (
Ardea herodias
) skims
along the shore of Padre Island, Texas, United States.
Its wing span is nearly 6 feet (1.8 m); it l ies with its
neck folded, which distinguishes it from cranes. Photo
by S.W. Aber.
