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 1929 1039 781 530 126 989 1.3 1.9
2013 2312 1527 1230 930 235 1835 1.5 2.0
2014 1774 1325 837 582 230 1109 1.3 1.9
2015 1333 1073 763 532 218 1015 1.3 1.9
2016 1321 1011 601 402 155 801 1.3 2.0
2017 1072 850 537 333 170 647 1.2 1.9
2018 1013 794 510 371 101 722 1.4 1.9
2019 951 813 598 408 151 800 1.3 2.0
2020 885 765 566 423 141 824 1.5 1.9
2021 1338 1023 697 447 213 843 1.2 1.9
2022 735 704 279 148 60 288 1.0 1.9