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

		Avg. per Count		Fraction of total
1.	Canada Goose	16278		52.6%
2.	Mallard	3513		11.4%
3.	European Starling	2622		8.5%
4.	American Tree Sparrow	1097		3.5%
5.	Dark-eyed Junco	959		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.
Display the Fermilab site's version of this plot.

The next 5 most numerous species are :-

		Avg. per Count		Fraction of total
6.	House Sparrow	728		2.4%
7.	Black-capped Chickadee	610		2%
8.	American Crow	604		2%
9.	Mourning Dove	594		1.9%
10.	Rock Pigeon	549		1.8%

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.