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FA229: A Beginner's Guide to Water Management—Common Aquatic Birds Using Florida Lakes

Figure 24. Overlay plots of annual rainfall amount (blue line with plus symbol) measured at the Orlando International Airport and annual aquatic bird abundance (red line with circle symbols) counted by LAKEWATCH volunteers on Lake Susannah in Orange County, Florida. The values in the plot for both annual rainfall and bird abundance are from moving averages calculated with the spline function in JMP statistical package (Statistical Analysis Software 2000) to better show the relation between rainfall and bird abundance.