Learning from roadkill
Sadly it is quite an efficient way of estimating wildlife populations in an area. The other day I found a beautiful, long-legged fox cub dead on the verge. I estimated it was about three months old so it must have been born quite early in the year.
Monitoring roadkill can yield interesting results. I live in Co Kildare and about 20 years ago the first evidence that pine martins had returned after a long absence was provided by one that had been hit by a car.