The time resolution is in years, which means that when you advance time it jumps a whole year with each click. It is as if you flew over the forest once a year, took a picture, and counted all the different items as part of the data collection. This data is the one presented in both the table and the graphs described below. It is in this piece of land that you can decide how many oak tree seedlings to plant. Since the spread of the crown of a full-grown oak tree can reach 50 ft in diameter, the maximum number of oak trees that can be planted is 60.
Computer screens have very small pixels, like little dots, used to paint images and text.
If you look at some images very close you might be able to see the individual pixels. Using this scale you can imagine that the squirrels are going to be very, very small. In fact, they are represented using a single gray pixel. They might be difficult to spot, so watch carefully. The red-tailed hawks, even though also small, are very easy to spot.