Coordinates
(45.3401, -122.639)
Substrate
Osprey Nest Platform
Description
This nest is right on Hwy 99, and close to the sign that says "welcome to Oregon City" The present map position is my best guess, I hope to get a measurement some day soon.
What to look for
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 Review All Observations
| 2019 - Kaj | 2018 - little john | 2016 - RuthMSmith |
---|
aAdult Arrival | 4/10/19 | 3/3/18 | 4/2/16 |
---|
aOccupied | Yes | Yes | Yes |
---|
aActive | | | |
---|
bEgg Laying | | | |
---|
bIncubation Initiation | | | |
---|
cClutch Hatching | | | |
---|
dNestlings | | | |
---|
eFledglings | | | |
---|
eFirst Chick Fledging | | | |
---|
fChicks Last Observed | | | |
---|
xNest Failure | | | |
---|
xReason For Nest Failure | | | |
---|
Select Seasons
Show reports, diaries, and photos from:Current 2019 2018 2017 2016
Activity reports
2016 Nest Activity Report by
RuthMSmithAdult arrival | 04/02/2016 | Nestlings | |
---|
Nest Occupied | Yes | Fledglings | |
---|
Nest Active | | First chick fledging | |
---|
Egg laying | | Chicks last observed | |
---|
Incubation initiation | | Nest failure | |
---|
Clutch hatching | | Reason for nest failure | |
---|
2018 Nest Activity Report by
little johnAdult arrival | 03/03/2018 | Nestlings | |
---|
Nest Occupied | Yes | Fledglings | |
---|
Nest Active | | First chick fledging | |
---|
Egg laying | | Chicks last observed | |
---|
Incubation initiation | | Nest failure | |
---|
Clutch hatching | | Reason for nest failure | |
---|
2019 Nest Activity Report by
KajAdult arrival | 04/10/2019 | Nestlings | |
---|
Nest Occupied | Yes | Fledglings | |
---|
Nest Active | | First chick fledging | |
---|
Egg laying | | Chicks last observed | |
---|
Incubation initiation | | Nest failure | |
---|
Clutch hatching | | Reason for nest failure | |
---|
Nesting Diaries
Both osprey were on the nest this morning on my way to work.
Stopped to observe for a few. She started calling out and I saw a Bald Eagle flying down river.
April 2 was the first day I saw the nest. The female was in the nest turning about, and the male was on a nearby perch. On April 26, I watched the nest from my parked car until I saw the female fly in and relieve the male of nest duties. Incubation is underway. On May 12, both adults were seen. They still appear to be incubating.