Graphical Summaries
The bird survey data has been collected since 1987. It is divided into 5 year survey periods,
and each year is divided into 48 quarter months.
Below are some graphical summaries of the survey results.
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Species vs Time and Period: A plot of the number of species versus time of
year for the combined survey as well as for each of the three survey periods.
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Species vs Time and Survey Combination: A plot of the number of species versus time of year
broken down by the various combinations of survey periods in which records occurred.
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Species vs Time and Status: A plot of the number of species versus time of
year broken down in terms of the following categories:-
Year round residents: Occur regularly throughout the year.
Summer residents: Occur regularly through the summer months but not
in winter.
Winter residents: Occur regularly through the winter months but not
in summer.
Migrants and vagrants: Fit none of the above categories.
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Species vs Time and Family: This plot shows how the family composition of migrants evolves
during migration periods.
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User Defined: Make your own plot.