Thank for your feedback Lynne. I think those are white tailed jack rabbit, quite common in North America. In winter they have a semi-white coat. Here is a link with more information about them.
http://enature.com/fieldguide/showSpeciesSH.asp?curGroupID=5&shapeID=1036&curPageNum=5&recnum=MA0065

With so much housing development near my area, lots of prairie life are bulldozed over My backyard i s unfenced in two side so rabbits can come and go. The white back fence was erected by neighbors on the other side.

Alfa Romeo 164 e Chevrolet HTTP://ALFAOMEGA.FOTOPAGES.COM

Interesting pictures.. especially the rabbits one. Hard to imagine wild rabbits running around.. as freely as stray dogs and cats roam around here.