Raptor Population Index

RPI Analysis Summary: Cape May


The initial RPI analysis effort examined hourly raptor migration count data from seven hawk watch sites in Canada and the United States. The following trend data and graphs indicate the population trends found for each of 15 species observed at Cape May.

Trend Data
Cape May raptor count trend data (Excel spreadsheet)

This spreadsheet organizes years by row and trend data by column. The sheet includes three sets of columns: the first indicates the longest-term trend and corresponding p-value; the second indicates the trend for years 1980-1990 and the corresponding p-value; the last indicates the trend for years 1990-2000 and the corresponding p-value.