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 2310 1525 1228 928 235 1831 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 1065 843 533 331 169 642 1.2 1.9
2018 1006 787 507 369 100 718 1.4 1.9
2019 941 805 594 404 151 794 1.3 2.0
2020 809 779 493 374 110 755 1.5 2.0