Monday, May 22, 2006

Animal overpass or human underpass?

The NYTimes reports that chickens might soon be able to cross the road---a road which previously divided one of the last grizzly bear refuges in half---on a huge earthen overpass. A few small ones are already in existence, for example near Banff: they are being monitored by pressure sensitive pads and night-vision cameras to check which and how many animals use them.

This is related to the problem discussed by Jared Strasburg in Nature: even if animals aren't killed on the roads, the cutting of a population into two by a highway can further endanger the sexual diversity of a species.


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