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.
Nest looks okay, but still not full. Male on nearby lightpole and one sitting in nest, possibly incubating? Another flew around and landed on different nearby lightpole, unsure of its sex. Later saw female on pole and male sitting in nest.
There is one adult present in the nest.There is also a chick visible! It is incredibly small compared to the chicks in nearby nests. It must have hatched recently. After fifteen minutes of observation the other adult osprey flew over from an adjacent light pole.
A female adult osprey is present in the center of the nest. There appears to be movement in the middle of the nest, but it is difficult to make out whether it was a hatchling or just nesting materials when the female readjusts herself.
The female Osprey was sitting in the middle of its nest when I first arrived on the scene. About five minutes later a male Osprey flew into the nest. The two sat side by side for a few minutes. The male Osprey then left while the female stayed.