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 1927 1037 779 529 126 986 1.3 1.9
2013 2309 1524 1228 928 235 1831 1.5 2.0
2014 1772 1323 836 581 230 1105 1.3 1.9
2015 1331 1071 762 531 218 1014 1.3 1.9
2016 1319 1009 600 402 154 801 1.3 2.0
2017 1063 841 532 330 168 640 1.2 1.9
2018 1005 786 506 368 100 717 1.4 1.9
2019 937 802 591 401 151 788 1.3 2.0
2020 593 570 291 183 46 357 1.2 2.0