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

		Avg. per Count		Fraction of total
1.	Red-winged Blackbird	3524		13.8%
2.	American Robin	1964		7.7%
3.	Canada Goose	1654		6.5%
4.	European Starling	1184		4.6%
5.	American Goldfinch	951		3.7%

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.	Yellow-rumped Warbler	905		3.6%
7.	Mallard	905		3.6%
8.	Common Grackle	877		3.4%
9.	Palm Warbler	663		2.6%
10.	Northern Cardinal	595		2.3%

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.