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 2309 1524 1228 928 235 1831 1.5 2.0
2014 1774 1325 837 581 230 1105 1.3 1.9
2015 1333 1073 762 531 218 1014 1.3 1.9
2016 1319 1008 599 401 154 800 1.3 2.0
2017 1063 841 532 329 168 637 1.2 1.9
2018 1002 782 503 366 100 712 1.4 1.9
2019 749 716 367 252 101 486 1.3 1.9