Summary Statistics

Raptor biologists assess the health of osprey populations by looking at several reproductive parameters. The table below is a live calculation based on activity data entered by Osprey Watch volunteers. Reproductive rates from 0.8 to 1.2 are minimum values to sustain a population. The higher these values are the healthier the osprey population. These rates vary based on age-to-first-reproduction, survivorship rates, and many other factors.

Total Number of Nests Number of Occupied Territories Number of Active Nests Number of Successful Nests Number of Failed Nests Number of Young Produced Number of Young Produced per Active Nests Number of Young Produced per Successful Nests
2012 1926 1036 779 529 126 986 1.3 1.9
2013 2300 1512 1220 920 232 1816 1.5 2.0
2014 1757 1309 820 568 226 1073 1.3 1.9
2015 1309 1049 741 518 208 988 1.3 1.9
2016 1316 1004 595 398 154 796 1.3 2.0
2017 997 801 501 305 161 596 1.2 2.0
2018 895 858 440 308 84 594 1.4 1.9