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 1772 1323 836 581 230 1105 1.3 1.9
2015 1331 1071 762 531 218 1014 1.3 1.9
2016 1318 1007 599 401 154 800 1.3 2.0
2017 1062 840 531 329 168 637 1.2 1.9
2018 1003 783 505 367 100 714 1.4 1.9
2019 918 897 577 390 145 763 1.3 2.0