This nest is about 1/3 mile below Lake Davis, CA dam, a few hundred yards down canyon from Nest 1390, in a dead top Jeffery Pine, 80 feet above ground.
What to look for
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.
5/24/13 First observation at 1100 hour, one bird in the incubating posture. Two adults flying high in the area, which could be the mates of the two nests very close together, both with incubating birds.
At 1300 hours, an adult brought a fish to the nest.
05/09/13 First activity observed this date this season, a lapse of 6 days, yet it seems the pair slipped in "ready to go" as I observed one on the edge of the nest, and one laying low in the nest in the incubating posture. This nest is hard to observe as the structure sits against other pines.
This nest was located while following an Osprey with fish fly from Lake Davis to the nest site. It is apparently an older nest at the top of a dead Jeffery Pine. An adult was in the incubating posture when viewed. Very inaccessible by ground.