![National Park Service Logo](https://webarchive.library.unt.edu/eot2008/20090510062622im_/http://www.nps.gov/pwr/templates/images/graphics/parkblackband.gif) |
![](https://webarchive.library.unt.edu/eot2008/20090510062622im_/http://www.nps.gov/pwr/templates/images/graphics/blkshim.gif) |
![National Park Service: U.S. Department of the Interior](https://webarchive.library.unt.edu/eot2008/20090510062622im_/http://www.nps.gov/pwr/templates/images/graphics/prntarrw.gif) ![National Park Service Arrowhead](https://webarchive.library.unt.edu/eot2008/20090510062622im_/http://www.nps.gov/pwr/templates/images/graphics/prnttitl.gif) |
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Alcatraz Island
Photos & Multimedia
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![Thumbnail of a cormorant scratching itself. Thumbnail of a cormorant scratching itself.](https://webarchive.library.unt.edu/eot2008/20090510062622im_/http://www.nps.gov/pwr/customcf/apps/CMS_HandF/Pictures/ALCA_gulls4.jpg) |
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Did You Know?
Some birds such as gulls, cormorants, and other seabirds can drink salt water. Excess salt is then excreted through a “salt gland” located near their eyes.
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Last Updated: February 05, 2008 at 17:43 EST |