Population ecology is the study of these and other questions about what factors affect population and how and why a population changes over time. Population ecology has its deepest historic roots, and its richest development, in the study of population growth, regulation, and dynamics, or demography.
When giraffes walk, they move both legs on one side of their body and then both legs on the other side; this is unique to giraffes. However, they run in a similar style to other mammals, swinging their rear legs and front legs in unison. They can reach 55 km/h (35 mph) at full speed but only in brief spurts.
Find out how to take action here. 1  Giraffes are the tallest mammals on Earth. Their legs alone are taller than many humansâabout 6 feet. 2  They can run as fast as 35 miles an hour over short distances, or cruise at 10 mph over longer distances. 3  A giraffe's neck is too short to reach the ground.