This is the storyboard for the Kaibab and Abert squirrels, that live on either side of the Grand Canyon, AZ
The North Rim squirrels are known as the Kaibab squirrels. They are a chestnut brown with large tufts on there ears.
After years of being separated they were reunited. They would not be able to interbreed and produce fertile offspring. This is due to the barriers made by how they evolved differently.
They were part of the same species. They all have tufts on their ears and are all around the same color. They all eat seeds ad bugs from the trees.
The river that ran through the Grand Canyon eroded the rocks. This caused them to be separated geographically. The North Rim is on a higher up then the South Rim.
The south rim squirrels are known as the Alberta squirrels and they didn't change much from the original species.