The Open Door Web Site
Part XV : Animal Dispersal Index
Birds, such as these flamingos in Kenya,
Reasons for Dispersal in Animals
Animal species need to disperse themselves for similar reasons as plant species. If there are too many individuals of a particular animal species in the same area, they will be in competition with each other.
Eventually, either one or more of the following reasons will contribute to the death of many individuals in the population:
In general, animals can populate new areas more easily than plants since most animals are not rooted in one spot -they can move. Zebra move to find fresh grass on the savannah plains and birds can fly a long way to find food.
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