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.
This may be a new nest as it is on a triangular wood platform just off Jamestown Beach but near the bridge that leads to the ferry terminal. I watched the male osprey leave the nest and have a short flight swoop on a bald eagle on the beach. He returned to the nest directly after. Not sure if a territorial thing. I did not see food involved. Very chilly day.
Female adult sitting on nest, male standing on nest. Male moved behind female and took over spot on nest; poked around nest with beak for a few minutes. Female flew to nearby tree and remained motionless in tree. Male stayed on nest for 10 minutes or so, then flew to nearby tree to join female. No bird on nest for last 10 minutes.
One adult and one chick on nest. Chick flew away from nest, harassed a bald eagle 250 yards from nest in shore tree making eagle fly away then chick returned to nest. Upon its return to nest it had talons out flying low across water, but never struck water. Adult never moved from nest.