There are two types of Fox In the forest these are natural variation in the population
On winter it snow in the Park and coveredalmost every land
The black and white Rats are prayed upon by the American crow. The black rats are eastly spottedBy the American crow from the sky
The animal with the best chance of survival is the white rats during winter , since it blends in with the snow covered background
the black rat is hunted and less of them are observe in the population . leaving the population of rats predominantly white colored
The white fur have trait have a high adaptive value during winter and allow white rats to survived and breed more viable offspring. this increase the frequency of the white fur allele in the gene pool-evolution has accured
