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 1928 1038 780 529 126 986 1.3 1.9
2013 2311 1526 1229 929 235 1832 1.5 2.0
2014 1773 1324 836 581 230 1105 1.3 1.9
2015 1332 1072 762 531 218 1014 1.3 1.9
2016 1320 1010 600 402 155 801 1.3 2.0
2017 1071 849 536 333 169 647 1.2 1.9
2018 1010 791 508 369 101 718 1.4 1.9
2019 944 808 596 406 151 797 1.3 2.0
2020 861 740 543 408 133 801 1.5 2.0
2021 1174 1111 645 410 178 782 1.2 1.9