Nest #637

Adult Arrival

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.

Incubation Initiation

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.

Clutch Hatching

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.

Nestling Count

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

Fledgling Count

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.

Nest Failure

Look for signs of nest failure like adult abandonment, adults no longer incubating eggs or feeding young.

Previous Next

	2023 - Rose	2012 - Scientific Homeschool
aAdult Arrival		3/4/12
aOccupied	Yes	No
aActive
bEgg Laying
bIncubation Initiation
cClutch Hatching	5/17/23
dNestlings
eFledglings
eFirst Chick Fledging
fChicks Last Observed
xNest Failure	6/6/23
xReason For Nest Failure	nest destroyed by substrate loss

Adult arrival	03/04/2012	Nestlings
Nest Occupied	No	Fledglings
Nest Active		First chick fledging
Egg laying		Chicks last observed
Incubation initiation		Nest failure
Clutch hatching		Reason for nest failure

Adult arrival		Nestlings
Nest Occupied	Yes	Fledglings
Nest Active		First chick fledging
Egg laying		Chicks last observed
Incubation initiation		Nest failure	06/06/2023
Clutch hatching	05/17/2023	Reason for nest failure	nest destroyed by substrate loss

Photos of this nest

Nesting Diaries

07/11/2023 by Rose

I have seen Osprey adults perched on this tower in the past week. There continues to be no evidence of nestlings or fledglings that I have seen.

06/13/2023 by Rose

Significant amount of nesting material has fallen to lower platforms. There continues to be no Osprey seen in the area. American Crows and Turkey Vultures have taken over the tower as a regular perching location.

06/06/2023 by Rose

Have not seen an adult Osprey on the nest or in the area in the last two weeks. I pass by here almost daily. Will check a few more times before I mark it as abandoned. A significant amount of nesting material has fallen off of the nest onto lower platforms.

05/19/2023 by Rose

Viewing nest from sidewalk behind 7-11 parking lot. Nest is on top platform of the cell tower, one bird sitting on the edge reaching down inside nest tending to nestling(s). Quite a bit of nesting material is piled up on the middle and lower platforms as if it had blown down from the top platform.

05/18/2023 by Rose

Have been watching this nest site all season as I drive past here almost daily. I had seen a newly constructed nest and Osprey sometimes flying around the tower but unable to see if there was a bird incubating on the nest. On 5/17/23 I observed one Osprey perched on pole near nest while a second flew in with food that was delivered inside the nest and not to the adult bird perched nearby.