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The spill that keeps on giving – now petroleum compounds and the chemicals used to clean up the oil from BP’s massive spill two years ago in the Gulf of Mexico are showing up in eggs of breeding birds in Minnesota.
When I picture state birds, I picture the gorgeous Scissor-tailed Flycatcher of Oklahoma, the pristine white feathers of Alaska’s Willow Ptarmigan , or the haunting call of Minnesota’s Common Loon. ” Best of all, they lay between 150 and 200 eggs per year. I don’t picture chickens. Though they only weigh.1-.2
” The report continues: “Following the breeding season, most tricolors are found in the Sacramento Valley where they aggregate with red-winged and other blackbird species and feed, often in large flocks, on ripening rice. See Birdchick’s post here.
What the Owl Knows is organized into nine chapters: introduction, adaptation (including vision and flight), research and researchers, vocalization, courtship and breeding, roosting and migration, cognition, and two chapters on owls and humans–captive owls (not zoos, educational owls) and owls in our cultural history.
The same argument can be made regarding prudential restraint in the number of eggs and chicks a pair of birds produce and nurtures in a nest. In some colonial nesting birds it has been observed that the number of eggs per nest varies from year to year, seemingly in correspondence to variation in food supply from year to year.
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