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Tuesday 30th August 2016
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How do they count the millions in animal migrations?


masai mara 146x100.jpgWhen there is a big animal migration and experts say "27million wildebeest make the migration" how do they count them?
Vic, Budely


** Definitive **
Name: Anwar, M40
Qualification: Engineer who loves science
Answer: The principal is calculated on population density. If the migration cover a 30 square mile area and if we know how many there are in one square mile, we can multiply it by 30 for a good estimate on the total number.
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