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.
Interesting day today. This morning while I observed , one bird got off the nest while the other sat down to incubate. Usually just the female incubates.
Then later in the afternoon, I noticed to Osprey on the next tower and thought they may have gotten off the nest. When one of the birds flew to the nest, it was repelled by a bird sitting in the nest. A second bird showed up to chase the intruders. Hopefully they don't come back.
Both birds busy working on the nest. This nest has failed the last two years, possibly taken down by the power company. I am in communication with the Project Manager to either have the nest protected or for them to install a platform nearby
Osprey next to the nest today, then I lost sight of it. I couldn't see an incubating bird on the nest but it could have been there.. Heavy winds forcast for tomorrow which isn't good for this nest that has a history of blowing down
The nest is back and being built quickly. I don't know if this nest is able to withstand the winds up on this tower. The birds are persistent, constantly rebuilding and fighting off eagles that nest nearby. Today both birds gathering sticks and copulating.
The nest is completely gone. I don't know if the power company removed it or if it blew away. I suspect the power company because there isn't a stick left. I'm surprised that I don't see the birds rebuilding since they are usually persistent. I'll keep watching