U.S. Fish and Wildlife Service biologists examine the nest and eggs of an endangered Mississippi Sandhill Crane.






At another nest, the biologist examines the crane eggs before floating them in water to determine the stage of development of the embryo and embryo viability.

Tom Carlisle Portfolio

Mississippi Sandhill Crane

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Mississippi Sandhill Crane

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He'll record how high the egg floats (stage of development) and watch to see if it wiggles (viability). The water contains antiseptic to prevent contamination of the egg. Mississippi Sandhill Crane National Wildlife Refuge, Mississippi.

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