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.
Spotted a female juvenile on the adjacent tower along with a turkey vulture on 9/20/13. She was calling, but received no response. The vultures (turkey and black) have taken over the towers at this point. Safe flight to our 2013 fledglings!
to wildlifenj-the tower is the center of the three towers - photos posted today. If you enter the park at the center entrance, drive to the white building, park and walk back a short way, tower is on your left.
I believe there are eggs in the nest. Stopped in about 6:15 4/10/13 and observed the male on the adjacent tower eating and the female sitting in the nest (incubating). After a few moments, he flew to the nest with the fish and delivered it to the female. The female took the fish to north tower to consume the fish, the male remained at the nest.
Both adults observed on Tuesday 3/26/13 @ 6:00 PM. Others at this location mentioned that the ospreys have been present for several days. The female was observed in the nest and was calling to the male who was eating on the adjacent tower.