The NY Times has an interesting op-ed piece by Christopher Ketcham on how a portion of the wild bison in Yellowstone National Park are slaughtered every year outside of public view. Apparently the National Park is killing a number of bison every year to appease a likely unwarranted fear by ranchers of the bison spreading an infection to cattle (there are no documented cases of occurrences). Until recently the media was not allowed to observed the killings. They are now allowed only a very limited and controlled observation.
Read story The Bison Roundup the Government Wants to Hide – The New York Times
Natural History Wanderings 
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