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Environmental Uptake of Lead in Black-Crowned Night Herons
1984Abstract Samples of black-crowned night heron tissue were examined for lead using spectrophotome tric analysis. Average lead content in tissues (in ppm wet weight) were 4.87 in eggshell, 3.6 in egg contents, 0.35 in developing embryos, and 18.3 in young heron tissues.
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Green Coloration of Recently Laid Black-Crowned Night-Heron Eggs
Colonial Waterbirds, 1991-Color of Black-crowned Night-Heron (Nycticorax nycticorax) eggs of known laying order was quantified in a Wisconsin colony. Eggs were of greener intensity on the day of laying and one day thereafter than earlier laid eggs within a clutch. Egg color can be used to identify clutches within one day after clutch completion and to assign laying order ...
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The Nesting of the Black-crowned Night Heron in Southern Ontario
1918(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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A Pennsylvania Black-Crowned Night Heron Colony
The Auk, 1933Wood, H. B., Wood, Merrill
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Transfer and accumulation of organochlorines from black‐crowned night‐heron eggs to chicks
Environmental Toxicology and Chemistry, 1995Thomas W Custer, Christine M Custer
exaly
Distribution and Biology of Black-crowned Night Herons in Alberta
The Canadian field-naturalist, 1971James Walker. Wolford, David A. Boag
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