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.
When I last checked on this nest, it ad three eggs and all three were being incubated. I checked on this nest today. All three eggs are gone. The three chicks that had hatched in the nest on the opposite side of the bridge where this nest lies also are gone.
I had a difficult time verifying whether the male had arrived, because two of the three times I observed the nest, I didn't see the male. However, on March 20, I observed the male fending off two other ospreys that kept trying to take the nest (which was empty at the the time; the female was nearby). I think the two ospreys were from a nearby tree that had previously harbored their own nest. The tree still stands, but very little of their nest remains. The male successfully fended them off, because when I returned to the nest on March 23, the male and the female were in the nest doing what they are supposed to do. The other two ospreys were in or near their tree/former nest, likely trying to figure out what to do.
Not sure what's happening with this nest. I have seen the female on several different occasions. It appears though that 3-4 ospreys are trying to occupy this nest. Each time what I think is a male osprey tries to land in the empty nest, it has to leave immediately to chase away 2 other ospreys.
Today I visited this nest, four days after my most recent visit. The youngest chick has died. Its feathered remains were still in the nest. Likely cause of death: malnutrition and pecking from the two older chicks. See photo.
Visited nest on June 3. All three chicks present. Smallest is quite a bit smaller than the other two, but I watched the mother feed the smallest quite a bit of fish this morning, much to the dismay of one of the larger chicks, which tried to peck it, but the mother was in between the two chicks.
I'm pretty sure I witnessed the native voyage of one of the young ospreys, because I watched it hover over the nest twice, and return to nest after hovering, and then on the third attempt after hovering it flew forward, made a large circle, and returned to the nest. The mother called out the entire time-my assumption is 'words' of encouragement. Great to see.
The older of the two chicks will be fledging soon. It is practicing ‘jump flying’ and it’s landings remain awkward. Yesterday it achieved about six inches of elevation. See the photo I added today. The younger chick also practices flying by flapping its wings, but does not yet achieve as much height.
The male (presumably) had brought a fish to nest for the female while hatching was under way. He eventually removed the fish and finished it nearby. The female continued attending to the hatching. She gave me one good look of the new chick. See photos.
Noticed the egg this morning and saw on the activity report that Suzanne first saw this one on the 30th of March. I can't edit her report but I first saw both Osprey on the nesting site on March 12th, not quite a week before the adult arrival noted here.
Our team (HRC bluebird trail at the Chick) has been monitoring this nest for about four years but haven't been this spring due to cancelling of the program. So, keep up the good work, Suzanne.
Female hasn't been seen in a while. The male and the chicks are in the area but haven't been back to the nest at the times I've gone to observe. Unsure if they've left the nest for keeps or just return at dusk.
On 5-12, all was well. On 5-13, this third egg was on the far side of the nest, alone and unloved.
However, when I returned on 5-16, the egg was not in evidence. Pushed off or back under the female...I wasn't sure.
This pair is on a bridge strut, returning to the same nest they used last year. It is very shallow and much of the nest uses the concrete from the bridge as a base. The pair arrived quite late, not till nearly the end of March, and spent little time updating and repairing the nest. Almost immediately (within 10 days), the female appears to be sitting on an egg. She is low in the nest, stands briefly, and then resumes sitting. We'll know more when we are able to kayak out and check.
We are very concerned about this nest. There was a female and two eggs their on June 16th, but no adult and only one egg there on June 19. Our fear is that this nest may have been abandoned.....will keep monitoring closely over the next few days.