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.
The two chicks have fledged in the past week, unfortunately was unable to catch the date. There is a baseball game in progress on the field below the nest. No birds on the nest today. Observed two adult Osprey flying approximately 300 feet away from the nest location and two fledgings flying below the adults in shorter distances.
Two nestlings continue sitting on edge of nest looking over the edge and flapping their wings. There is a third bird sitting low in the nest with only the top of its head visible. There is a baseball game in progress on the field below the nest with a lot of people and activity so was a short visit today.
Two nestlings perched on edge of nest looking over the edge and flapping their wings. One parent perched on nearby light pole calling to young birds. Watched for an hour hoping to see them fledge. There are two nestlings ready to fledge soon; was originally three in the nest. Photo added.
Confirmed incubation behavior today. Female sitting low in nest with flat back. Unable to see her until she stood up and repositioned. Male flying around overhead most of the morning and later stopped to perch on edge of nest and interact with female. Was walking the trail when he flew in so did not see if he brought food to her or not.
Quick visit today. Nest has been completed. Do not see female today. It is possible she has started incubating eggs and sitting too low in the nest to be seen. Male flying high over nest site along with two Bald Eagles. Plan to spend more time observing nest later in the week.
One chick sitting on the edge of the nest and adult female sitting down inside nest. Do not see second chick today. Possibly inside nest with female or fledged and out of sight. Male perched on nearby light fixture. Photo to add.
Have checked on nest several times since last diary update. Parents continue tending to chicks in nest. Have seen at least two little heads in the nest, possibly three. Difficult to see activity inside this nest.
Female sitting on edge of nest today reaching down inside and sheltering nestling(s) with her wing as a Bald Eagle flew overhead. Male flew in with a fish, and watched him get in and out of the nest and feed nestling(s). Can see movement inside nest but not able to determine number of nestlings at this point.
Watched nest for about 30 minutes today. Female continues incubation behavior, sitting low in nest until male flew in with food for her. Watched them chatter with each other for a while after he arrived. Photo added.
Very windy day! One bird observed perched on edge of nest, bending down and tending to something inside the nest. Initially was unsure if there was a second bird in the nest though photo enlarged and able to see second bird's tail feathers sticking out of the nest. Bird sitting low in nest with flat back, tip of tail feathers visible. Photo added. Incubation documented. Bald eagle circling high overhead.
Today we saw both adults and one visible older nestling. There was a Bald Eagle circling high over the nest for a while with the female hiding the nestling while the male made a lot of noise, circling over the nest and under the eagle.
Female perched on edge of nest preening and reaching inside multiple times as if tending something inside, also getting in and out of nest. Unable to see any activity inside nest due to available vantage points.
Quick check on the nest today. I see one bird circling very high above the nest area. Do not see a second bird on the nest, nestlings or adult interaction with the nest. Difficult to get a good look inside the nest from available vantage points on school property.