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.
No birds on the nest today. One fledgling perched on the closest adjacent light fixture. Two adults seen perched nearby around the football stadium. This bird has fledged within the last four days (estimating fledge date).
Nestling sitting on edge of nest flapping wings. Female on nest then flew to nearby light pole and started calling for nestling. Male also perched on a different light pole and was calling to nestling. Will check back in a few days to see if it has fledged. Saw another young Osprey flying around the Sports Complex in short distances. Suspect it is one of the fledglings from the Lafayette HS nest nearby as this Warhill nest lagged behind by a few weeks compared to others in the area and have only been seeing one nestling here for a while now.
Sporting events in progress at the complex with lots of people and activity below nest. Same situation observed yesterday. One bird observed on nest with wings outstretched covering nestling(s). Second adult bird seen flying high above the area.
Continued incubation by female, sitting low in nest. However she is getting up to reposition and rearrange eggs fairly often. Male flew in with food and was seen around the complex fishing in both ponds.
Demonstrating incubation behavior today - female sitting low in nest with only tail feathers visible sticking out over the side. Stood up and repositioned several times. Male flew in with some food that they shared.
Female perched on edge of nest today, occasionally getting in and out of nest and rearranging some of the nesting material. Watched her for about an hour and did not see male in the vicinity until she started calling. He quickly flew in and perched on a nearby structure. Appears to still be working on nest construction and not incubating eggs yet.
Additional nesting material has been added over the past week and structure looks like a complete nest at this point. Female perched on pole next to nest. Male flying in the area. Plan to check back several times this week to see if she starts incubation behavior.
Today the female is perched on the light fixture that was their previous nest site. Nesting material has been placed in the last several days and is now a partially constructed nest. There are pieces of nesting material that have been placed on three other adjacent light fixtures as well but it appears that they have decided to rebuild at their original location.
Have checked on this nest location several times in the past week. Both birds remain in the area. A very small amount of nesting material has been placed on a different light fixture on the same field. Will check on them again by the end of the week.
Male and female perched on light fixture (previous nest site) nuzzling at each other's neck area. Nest completely destroyed from last year. I had checked two days earlier this week and today is the first time I've seen both birds here. Nesting material has not been added yet.
One Osprey observed flying over nearby pond today but did not visit old nest site while I was there. Nest from previous years has been completely removed. Will be monitoring location in upcoming weeks for pair arrival.
Went back to check on the fledglings today. One is in the parking lot, moving around on nearby structures, same as yesterday. One fledgling is on the nest picking at some food remnants. The third is perched on the same light fixture as yesterday. Watched all three for a while then both parents flew in; the male joined the one chick on the nest while the female flew back out to circle above the pond. Adding photos of each chick (the one on light fixture is further away, unable to get closer photo).
All three chicks have fledged recently. Found the three perched on separate light fixtures near their nest, each approximately 100-200 feet from the nest. One of the birds was practicing short flight distances, moving from one light fixture to the next around the soccer field and parking lot. Light to steady rain today; poor photography conditions. Did obtain phone video of the closest bird. Will check on them again tomorrow and attempt to get decent photos.
Watched nest for about an hour today. Female was perched on nearby light fixture then male flew in with a fish (Orange Carp). Female joined male on nest and picked apart fish and fed nestlings while male sat on nest facing the opposite way. I could only see two nestlings at a time today. They shuffled around a few times and the third nestling is possibly still there but did not see all three simultaneously.
Received word from a friend that the Osprey have returned and were observed yesterday 3/6/22 sitting on the light fixture at this nest site. I visited nest site today and both Osprey are here. They were not actively nest building when I was there but it appears that new sticks have been added to the existing nest location and I observed a courtship aerial display above nest site. It is a windy day with gusts 45 mph so was an impressive aerial display! Will check back in a few days.
There are at least two chicks in the nest, climbing up to the edge of nest and looking down. Have seen two at the same time but there is a lot of activity in the nest, suspect there may be a 3rd chick that I'm not able to see from available vantage points. Female perched on edge of nest. Will check again within a week.
Two chicks observed and photographed on nest by a Master Naturalist colleague on 08/10/20. I spent considerable time walking the area the following week and did not see any osprey chicks or adults. Last date observed 08/10/20.
Three chicks sitting on nest today without adults present. Watched for a while then all three flew to nearby light poles one after the other. The third bird was more hesitant to fly but eventually followed the other two.
One chick has fledged since I last visited, perched on nearby light pole. The other two chicks perched on nest, one flapping wings and looking over the edge and one resting. Adult male flying overhead.
Three chicks still perched on nest with one adult. One of the chicks is seriously flapping wings and making little jumps like it is ready to fledge very soon, the other two were just looking around curiously.
Two chicks sitting very low in nest, initially with no adult present. Could not see them until female flew in with food. Definitely two chicks, could possibly be a third, still difficult to tell at this point.
Female sitting on edge of nest, continuing to tend to chick(s) in nest. Have only seen one head pop up at a time though there is a lot of movement inside of nest, making me think there is more than one chick. Will keep checking on them 1-2 times/week.
Female perched on edge of nest, reaching inside, feeding and tending to nestlings. Unable to see their heads over the top of the nest at this point but there appears to be at least two nestlings inside the nest that the mother is tending to. Male flying in the area, occasionally calling.
Checked on nest after 50 mph wind gusts earlier this week. Several sticks have blown to the ground but the nest remains intact. Watched what looked like an empty nest for 30 minutes before a bird sitting very low in nest stood up and repositioned. Second bird soaring high overhead. Incubation documented this date.
Male & female observed sitting on nest that they have rebuilt. The nest from last year had been completely destroyed except for a single stick on top of the pole. This pair was later to arrive to this location than the other osprey in the area. Had been checking on this nest location almost daily at the beginning of March, looking for the arrival of this pair. The last date I had checked here looking for them was March 12 so they arrived sometime after that.