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.
One osprey was sitting in the nest, possibly incubating, then the other flew up to be in the nest as well. Nest is good. Later, another male flew up to nest (possibly for the female?) and the male chased him off then went back to the nest.
Both a male and female osprey were present in the nest. After five minutes one flew away. A nestling popped out of the nest soon after. The nestling is stretching and attempting to flap its brand new wings. Its wings are incredibly floppy and noodle-like, thin and sparsely covered in down. After about fifteen minutes of observation, a second chick was visible peeping its head out.
Both male and female osprey were present. One osprey was tending to the center of the nest, appearing to be rearranging materials. The male osprey flew away after fifteen minutes to land and stand watch on a nearby light pole.
There is a female laying very low in the nest. The male osprey was seen landing and dropping something off. There was movement in the nest but it could have just been the female rearranging her nesting materials.