The graph illustrates wildlife population from 2011 to 2016 in North America.
Overall, we can observe the population of such animals as wild bears, dolphins, and whales. In comparison with population of bears, what figure only grows, opulation of dolphins decreases every year, when population of wild whales fluctuates.
Despite the fact that in 2011 population of wilde bears has extremely low number, in next years, we can see dramatic lncrease of the species for all the next time long. Cope with bears, the population of wild dolphins has downward trend, so when in 2011 the population contained 150 animals, in 2016 the figure became about few species.
Also, the data presents sharp changes of population of wild whales. Every year the figure has different values, though in 2012 it reached the lowest point as 50 species and already in 2013 it was about one hundred, the next years the numbers fluctuated in area from 70 to 100.
In conclusion, we can say that all the various of wild animals has completely different tendencies during all the period of the observation.