the change in squirrels' population over time needs to be shown in a graph
red_bellied_squirrel is squirrel. squirrels is animals. neotropical_pygmy_squirrel is squirrel. red_bellied_squirrel is mammal. red_bellied_squirrel is not squirrel. squirrels is mammals. african_pygmy_squirrel is squirrel. tree_squirrels has adapted_to_urban_areas squirrels is not mammals. red_bellied_squirrel is not mammal.