How have zebra and wildebeest and Thomson's gazelle adapted in anatomy and body function to avoid competition?

All three tend to feed on the same plants/grasses. However each species feeds on a different section of the plant. The zebra tend to feed on the uppermost part of the grasses, the wildebeest feed on the middle sections while the Gazelles feed on the lower section. This way they can feed on the same plants without being in direct competition.

Hope that helps.