A variety of sampling methods are used to measure abundance. For larger animals, these may include spotlight counts, track counts and roadkill counts, as well as presence at monitoring stations.[2] In many plant communities the abundances of plant species are measured by plant cover, i.e. the relative area covered by different plant species in a small plot.[3] Abundance is in simplest terms usually measured by identifying and counting every individual of every species in a given sector. It is common for the distribution of species to be skewed so that a few species take up the bulk of individuals collected.[3]