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 nest should be eliminated. It is shown super-imposed on nest 7415 which is the active Bloomsbury nest and is actually located in Bloomsbury Park! The nest listed here #7672 is listed as being located where the Fuel Ox nest #7880 is actually located. Thus, this nest #7672 should be removed from Osprey Watch as it might confuse observers/reporters.
This nest is shown on the map as very close, almost super-imposed, on tower/nest #7415. #7415 is active in 2020, and is actually in Bloomsbury park. This listing for #7672 is accurately described as being close to the Bethlehem-Bloomsbury line even though the blue dot is misplaced. However, ANOTHER LISTING for the tower along route 173 close to the Bethlehem-Bloomsbury line has been created as #7880, and is named "FUEL OX" which describes the business on whose property the tower stands. This new listing for #7880 is, in fact, close to the Bloomsbury/Bethlehem township line, and it is now shown by a blue dot in the correct place on the map, along route 173. I have been following the nest on route 173, now designated #7880, and my reports are found on the page for TOWER/NEST #7880 AKA FUEL OX. Thus, this listing for #7672 should be eliminated as being redundant and confusing, and the "extra" blue dot at the Bloomsbury park, which indicates (incorrectly) #7672 should also be removed. The actual nest in Bloomsbury Park is #7415 which I am also reporting on and following. If the history from 2019, which is shown on this page, is accurate, perhaps it could be merged with my reports for #7880/2020.