For the third consecutive year, the number of deer-vehicle collisions in the US has dropped. And the downturn is accelerating. The percentage decline over the last year is nearly three times as large as during the previous two years combined. Using its claims data, leading US auto insurer State Farm, estimates 1.09 million collisions between deer and vehicles occurred in the US between 1 July, 2010 and 30 June, 2011.