Look for 2 adults on the nest. The adult pair will show pair bonding behaviors such as vocalizations, aerial sky dances, and the male feeding the female fish. You may see the pair copulating, which typically begins 14 days before laying eggs.
Females will lay 1 - 4 eggs at a rate of one egg every 1 - 2 days. After laying, incubation starts. Look for adults taking turns sitting low in the nest incubating eggs. The incubation period can last 35 - 43 days.
Chicks hatch ~39 days after incubation begins. Look for adults bringing food to the nest and making "head bows" into the center. Chicks typically can't be seen until they are 2 - 3 weeks old, so feeding behavior is the only way to know chicks are there.
Around 4 weeks after hatching, look for the heads of chicks to show over the rim of the nest, particularly when adults bring food to the nest. Other times they lie flat and are harder to see. Count the number of chicks in the nest before they learn to fly
Chicks begin flying around 7 - 8 weeks old, and are still fed by the adults. Count the number of chicks who have successfully fledged the nest and are observed flying.
Chick Last Observed
4 - 10 weeks after fledging, chicks begin leaving the nest area to migrate south, once they have learned to fly and feed themselves. Record the date that the last chick left the nest.
Look for signs of nest failure like adult abandonment, adults no longer incubating eggs or feeding young.
2015 nest first built, but wasn't monitored. One chick photographed by John Wiliszowski in middle of July.
2016 started monitoring for Audubon/South Shore Sanctuaries. Appeared to be nesting in March, but early June no activity.
2017 One chick early June, then early July saw both chicks. One fledged late July, the other early August.
2018 One chick middle of June. Temperatures between 6/29-7/4 were 87/90/93/88/92/88 degrees and osprey were panting. Neighbor's drone took picture of empty nest 7/4.
2019 Nest re-building occurred late April, but no sign of a chick. Late June no activity.
2020 Monitoring for Mass Audubon - South Coast. No activity.