The five most numerous species recorded on the Fermilab Christmas Bird Count are respectively:-

		Avg. per Count		Fraction of total
1.	Canada Goose	16832		52.4%
2.	Mallard	3632		11.3%
3.	European Starling	2896		9%
4.	American Tree Sparrow	1117		3.5%
5.	Dark-eyed Junco	980		3.1%

Display a Plot showing how the contributions from these species to the total count has evolved over time.
Display the Fermilab site's version of this plot.

Display a Plot showing the evolution of the count composition after the contributions from the top 2 species have been removed.
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The next 5 most numerous species are :-

		Avg. per Count		Fraction of total
6.	House Sparrow	745		2.3%
7.	Black-capped Chickadee	617		1.9%
8.	Mourning Dove	602		1.9%
9.	American Crow	552		1.7%
10.	Rock Pigeon	522		1.6%

Display a Plot showing the evolution of the count composition after the contributions from the top 5 species have been removed.
Display the Fermilab site's version of this plot.