Colonial Waterbird Trends
The graphs below depict annual trends in the number of nesting pairs of a representative collection of marsh and open water feeding colonial nesting waterbird species. Trends are considered to be significant if the R2 value (a measure of how well the trend line describes the the data) is greater than or equal to 0.25. The closer the R2 value is to 1.00, the stronger the trend.
For additional information describing the physical description and life history characteristics, click on the name of the bird. The trends below are summarized in the Galveston Bay Colonial Waterbird Indicator.