Tall Jeffery pine on edge of Lake Davis, seen from the dam.
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.
On March 27, 2016 I observed a Bald Eagle in this nest, apparently in the incubating posture. They attempted to take this osprey nest over two years ago but were driven off, and settled for another osprey nest about 1/4 mile away, where they raised one eaglet. Also on this date, I observed an adult Bald Eagle at a nest they had occupied a few years ago. I guess site #1066 won the choice.
06/27/14 One adult flew from nest with partial fish, then returned without it. OPne adult in nest appears to be tending young.
07/15/14 One adult flew into nest site. One adult on edge of nest in shadig posture, 98 degrees. Possible two young in nest.
07/23/14 One adult perched by nest, activity observed in nest.
07/29/14 Two young on edge of nest flexing wings.
04/08/14 This could be interesting. Two adult Bald Eagles were alongside the nest. One Osprey was across the small bay perched in a favored tree.
04/17/14 No Bald Eaglees, but one Osprey perched by the nest.
04/28/14 One perched alongside the nest, one perched above the nest.
05/12/14 One at the nest.
05/24/14 One at nest in incubating posture.
8/19/13 With two observations an hour apart, one adult perched below the nest with another perched on a favorite limb abot 200 years away. During latter observation, possible movement of one young in the nest.
8/13/13 I was hoping that I'd see the young perched on the edge of the nest, but no such luck. At noon an adult was perched on a lib above the nest. Aty 1300 hours an adult was perched below the nest, but no young observed.
04/03/13 No activity.
04/11/13 One in the nest, one perched alongside nest.
04/18/13 One standing in nest, one perched lower down on same tree.
04/25/13 One bird peerched by the nest.
05/02/13 Two perched below nest on same tree.
07/18/12 At 11:00 no birds appeared on or around the nest. However, at3:00, one adult was on the nest feeding a chick, and another arrived with a fish. Guessing the young was laid low at 11:00 while both parents were fishing.
6/14/12 One adult low in nest, another came with a partially eaten fish and settled in close to the other. Both seemed to be eating off the fish, then one took the fish to a limb near the nest and continued eating the now quite small portion.