Sits on a dead tree in the middle of a pond.
This nest is in Warren, MA.
What to look for
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.
Warren Osprey 2021
3/29 The osprey nest survived the winter's storms unscathed.
Two osprey were sitting close to each other on the same branch in a tree on the edge of the pond where the nest is located.
4/3 An osprey was sitting on the edge of the nest, not down in the cup/bowl of the nest.
After about 15 minutes a second osprey flew to the nest and landed. Soon a second bird arrived at the nest, it moved toward the bird already on the nest and mounted that bird.
After briefly copulating the male flew away to a tree on the edge of the pond. The female remained at the nest.
4/7 Two osprey were perched on the far side of the pond in the same tree but about 15 feet apart.
4/21 One osprey was sitting down in the nest, the bird's head just visible above the edge of the nest.
I heard an osprey call and and then saw adult bald eagle fly within 100 feet of the osprey nest.
Then I noticed a second osprey that was carrying a fish.
The eagle and two osprey flew around the pond near the nest for about 5 minutes then I noticed a second eagle flying over the far end of the pond several hundred yards away. I believe that the second eagle was a bird in basic III or IV plumage.
Several minutes after the eagles departed one of the osprey returned to the nest and sat on the edge of the nest.
Very shortly a second osprey flew to the nest. Almost immediately the bird that had just arrived at the nest mounted the first bird that had returned to the nest first.
Copulation was brief, then one bird (male?) flew from the nest.
Later an adult osprey came to the nest carrying something that looked like a small stick. After leaving the object at the nest the bire then left the nest.
Shortly after that an osprey came to the nest carrying a fish.
5/2 An adult bird was sitting down in the nest possibly incubating eggs.
5/10 An adult bird was sitting down in the nest possibly incubating eggs.
5/27 One osprey on the nest, another arrived and quickly mounted the bird that was already at the nest and copulated, after the male left the female remained with her tail elevated.
6/1 A bald eagle (white head and tail) flew by the pond to the east. An osprey that had been perched in a tree by the pond left its perch and flew in the direction of the eagle. The osprey did’t get close to the eagle, but followed the eagle out of sight as it flew to the south.
6/14 Two osprey on the nest, one bird’s back/wings/tail was visible (sitting on rim of nest?), the other bird’s head was just visible (the bird appeared to be sitting down in the nest.)
The most visible bird appeared to be eating, it lowered its head repeatedly and its bill was seen opening and closing as it raised it head.
6/16 One osprey was on the nest, perched on the edge of the nest, not sitting down in the cup/bowl of the nest.
A short while later a second osprey arrived at the nest. It appeared that one bird was either eating or feed a nestling as the bird continually bend down and could be seen making a pulling motion.
6/17 An adult was perched on the edge of the nest.
I noticed movement through the branches of the nest and could see part of a nestling’s head so there is at least one nestling in the nest.
6/19 One adult on the nest, appeared to be feeding, didn’t look like it was feeding nestlings because the bird’s heads was visible when it was upright and its tail was visible when it bent forward, the bird was facing away from the center of the nest.
7/4 One osprey on the nest, another adult (smaller, male?) brought a stick to the nest.
The bird that remained on the nest moved to the other side of the nest and may have been feeding because the bird kept moving its head down into the nest.
One nestling was occasionally visible.
7/7 One adult osprey was perched on the nest and another adult was perched on a branch of the nest tree.
One adult flew down close to the water, dragged its feet in the water as it flew away from the nest low over the water. At the end of the pond it gained altitude, flew west over South Street and out of sight
I saw a large nestling in the nest, back fully feathered showing white speckling, and a glimpse of the wing flight feathers. The wing feathers are partially developed, the nestling did flap its wings a few times
7/15 Saw a second nestling today for the first time.
One adult (male?) was perched in a tree about 100 yards from the nest. Initially both nestling were on the other side of the nest from where the other adult (female?) was sitting on the rim of the nest.
The adult in the nest began feeding a nestling whose head was just barely visible above the rim of the nest. The other nestling sat on the far side of the nest watching.
After the nestling being fed was sated the second nestling moved across the nest and began to be fed by the adult.
There was no aggression or fighting between the nestlings during this time.
Both nestlings were seen exercising their wings.
7/25 An adult arrived at the nest carrying nesting material, sticks and grass.
An adult left the nest, flying away to the west and about five minutes later a adult arrived at the nest carrying a stick.
7/29 Two juveniles on the nest. One nestling flew from the nest towards the far end of the pond then flew around the pond and returned to the nest.
An adult was perched on a tree on the far side of the pond.
A second nestling began exercising its wings and this time the bird lifted off and flew away from the nest. This may have been the bird’s first flight. Before taking flight the bird was bobbing its head up and down similar to what owls sometimes do.
This juvenile flew around the pond for awhile, doing a couple of laps at an altitude above the the nest before returning to the nest.
7/30 Two juveniles were perched in trees on the far side of the pond, an adult flew by the juveniles carrying a fish and landed in an abandoned great blue heron nest and began to eat the fish. Subsequently a juvenile hopped down the branch and was fed by the adult.
8/4 At the osprey pond today and I was treated to aerial displays by the juveniles.
One juvenile took off from its perch and dove right into the pond at the far edge, it flew off of the tree it had been perched on and dove into the water.
Not sure if the birds is bathing, swimming or fishing?
The juvenile was strong enough to get itself out of the water which it did after sitting in the water with its wing out and tail fanned for a short time.
Both juveniles spent time flying around the pond, one dragged its feet in the water and one flew to the nest an stayed briefly.
An adult was in a tree on the far shore.
At the no named pond on New Reed I saw an adult osprey make several circles over the pond but after several passes the bird flew away.
Warren Osprey Nest 2020
The pond is located adjacent to South Street in Warren about 1/3 of a mile from the intersection or New Reed Street and Brook Road.
One bird was on the nest when the other bird that had been perched nearby flew to the nest to join the other bird.
One bird was on the nest and the other again perched nearby. The perched bird flew but did not approach the nest, instead circled and flew away. I stayed another 1/2 hour but the second bird did not return.
There was a bird on the nest. A second bird was not present during our half and hour stay.
I visited the osprey nest today, watched the nest for about half a hour.
For the first 20 minutes there was no activity. Nothing visible in the nest, no movement. Then I saw the very top of an osprey's head briefly.
About 10 minutes later a second osprey arrived at the nest. The bird approached the nest from directly opposite of my position, flying lower than the nest and rising up to the nest's height just before arriving at the nest so I didn't see it approach until it was almost on the nest. It flapped a few times above the nest then settled. The other osprey rose up and was visible behind the newly arrived bird.
Almost immediately one osprey flew away from the nest carrying a portion of a fish.
I am unable to say if the bird flying to the nest was carrying anything. Nor can I say which bird flew away, the one that had been sitting on the nest or the one that flew into the nest. Once the arriving bird settled there was some brief movement then the birds stood very close together in the nest for a very short time.
The bird that flew away was carrying the portion of the fish in its beak. It appeared to be transferring the fish to its talons. The bird few out of view into the trees on the far side of the pond. After about five minutes the bird in the trees flew away. The bird did not appear to be carrying anything in its beak or talons.
Visited for about an hour at midday, no activity at the nest, no osprey seen.
There was one bird on the nest, the top of an osprey's head was visible briefly several times but the bird on the nest didn't appear to stand, it just lifted its head periodically. No second bird was sighted.
I visited the osprey nest today for about 45 minutes, about 1:00 p.m.
When I arrived there was a bird on the nest with its head visible. The bird was actively look around.
Periodically the bird would move so that more of its back was visible. I believe the bird was standing up in the nest.
Then the head would disappear and more of the wings and the tail would become visible briefly.
This happened several times during the time I was watching the nest.
I never saw anything in the birds beak after it raised its head after the head had been out of sight for a short time.
A second bird was not seen.
There was a bird on the nest. It was not very active, it didn't move around much except for turning its head occasionally.
As I approached the nest today I could see one bird standing on the nest.
As I was parking the car, with the window down, I could hear the bird on the nest calling. Just as I stopped the car a second osprey arrived at the nest carrying a fish.
Both birds sat on the nest for a couple of minutes then the bird that had arrived with the fish flew to a tree at the edge of the pond. It perched there for about 5 minutes. The bird on the nest continued to call.
Then bird with the fish returned to the nest. Both birds could be seen bending forward into the nest a couple of time. The bird that had brought the fish then left the nest and perched in a tree about 50' away.
I could see one chick in the nest. It appeared that the adult in the nest was feeding the chick. There may be other chicks in the nest but I only saw on chick.
When I arrived the bird at the nest was standing and no young were visible. After awhile the adult moved around and then appeared to be feeding young. The view wasn't terrific as we watched in real time, however when I got a chance to examine the photos I now see there are two young in the nest. The feeding activity happened quickly. After a brief period of activity the birds settled down and I could only see the adult.
One adult on the nest, 2 chicks visible occasionally, a second adult came to the nest with a fish
The second adult stayed in the nest awhile, there was movement by the adults and the chicks, the birds could be seen occasionally moving about but it was not possible to see if there was any feeding activity
An adult left with a good sized fish which was minus the head. The adult returned after about 5 minutes with the fish, however much of the fish had been consumed
When returning to the nest the adult was harassed by an eastern kingbird
An adult left the nest after several minutes carrying part of a fish, unsure if it was the same bird that had come to the nest a few minutes before and if it was the same fish that was being carried by the bird that had come to the nest
As the osprey circled gaining altitude it was again harassed by a kingbird
Some pictures below.
There was an adult on the nest and the young were only partially visible.
After a while the adult on the nest took off and did a lap around the beaver pond then returned to the nest.
After that I saw one chick then another exercise its wings. It appears that the secondary feathers on the wing are not fully developed.
I'm beginning to feel like I'm watching a Shriner's clown car! I now believe there may actually be three young birds in the nest.
In some of the pictures I took a 4th bird is visible in the nest.
This another of the nestlings exercising its wings. This bird started a little after the other bird finished. This bird flapped its wings more vigorously and for a little longer than the other bird.
The wing flapping started after the adult did the flight around the pond. Showing the kids how its done?
An adult was at the nest when I arrived and 2 chicks were partially visible.
The adult left the nest and flew about 200' and landed in a tree at the far edge of the pond. After a while an adult returned to the nest. That is the first time I have seen the young in the nest unattended by an adult.
One chick spent about a minute vigorous flapping it wings. It didn't appear that the bird achieved liftoff, but stayed standing on the nest.
An adult returned to the nest then a second adult came to the nest carrying a fish. The second bird landed on the nest with the other adult and the three young birds. The second adult that came to the nest didn't stay at the nest very long. When this bird left the nest I couldn't determine if it took the fish with it when the bird left the nest.
We never saw any activity that looked like an adult was feeding a chick.
One on the adults flew around the pond several times at a height above the treetops, maybe 100' above the pond.
Usually I am at the nest mid day but today I went at 4:00 p.m.
Two young were standing on the nest and the third was partially visible. Both adults were in trees at the edge of the pond, the closest maybe 200' away the other adult a little further away. Some of the birds were calling.
Eventually one of the adult left its perch and flew around the pond. It flew for about 3-4 minutes at altitudes just above nest height to over 100' above the pond. It circled the pond for a short time (less than a minute) then the bird flew closer to the nest flying circles fairly close to the nest at heights just above the nest to about 75' above the nest. Then the bird circled the pond some more. The birds on the nest watched the circling adult.
The bird landed in a tree on the edge of the pond.
Then a short while later and adult came to the nest carrying a fish.
The second adult bird then came to the nest. This bird did not have a fish. It stayed awhile, left the nest and returned a short time late before leaving for good and flying to perched in a tree on the edge of the pond.
When the adult without the fish left the adult that brought the fish stayed on the nest.
It appeared the at least one young was feeding and another young bird moved toward the side of the nest where the feeding juvenile apparently eating. This was near where the adult with the fish had landed. The juvenile that appeared to be eating would lower its head out of sight and it looked like it was moving its body a little, what you would expect if the bird was tugging at flesh on the fish in the nest.
The adult on the nest left and flew away, landing in a tree at the far end of the pond, over 300 yards away.
I did not see the juvenile birds exercising their wings.
An adult does a fly by the nest as the young birds watch
The young watch as an adult flies around the pond
An adult arrives with a fish
The second adult arrives
The second adult leaving the nest
Second adult returning a short while later and left again after staying on the nest a short time
A three young were standing on the nest.
An adult was perched in a tree at the edge of the pond. The adult moved from on perch to another perch closer to the nest then moved back to its original position. The adult did one flight, around the pond, and returning to its starting position.
It didn't appear to be carrying a fish and it did not fly close to the nest.
The young spent a lot of time preening and two of the bird did some boisterous wing flapping. They lifted off of the nest briefly.
When I arrived one young was in the nest, another was perched in a tree about 200' from the nest and an adult was another 100' or so further along the pond shore in a tree.
After a while another osprey appeared and the adult left its perch. The two bird performed several minutes of impressive aerial displays, flying around the pond below tree level and above tree level while swooping and diving, occasionally interacting with each flying very close together. This went on for over 10 minutes. At times the birds would disappear out of sight and once they soared up and away, once going at least a mile from the nest and rising up until they were almost invisible to the naked eye. They returned a while later and did some more flying around the pond.
The juvenile in the nest and the one perched at the edge of the pond observed but did not react in any noticeable way.
I scanned the trees at the edge of the pond several times searching for the third juvenile but didn't find the bird.
When the two birds were far from the nest soaring higher and higher I saw a third bird lower in the sky. It did not rise up when the other two birds gained altitude. This third bird wasn't high in the sky so I never go a good look at the profile of the wings so it may have been an osprey, I don't think it was a TV which are seen drifting around occasionally. It did appear to be about the same size as the two osprey.
Based on the pictures I took I think the two birds doing the aerial displays were the two adults. One bird has a noticeable dark area at the center of its tail that is visible in earlier pictures of an adult bringing food to the nest. The other bird looks to have a couple of wing feathers missing and the two outer tail feathers appear to be shorter than the other tail feathers. Also the back and upper wing surface on the two flying birds looks more uniformly dark than the fresh feathers of the juveniles that give the young birds' back and wings a mottled look.
Some pictures form the 7/24 visit to the osprey nest.
The five pictures above were taken over a period of about 3 minutes. The bird was vigorously flapping for most of that time.
The three pictures above were taken over a period of about four minutes. This started about three minutes after the previous pictures were taken. The flapping was even more vigorous and lasted about four minutes. I though the bird was going to leave the nest.
At the nest I wasn't able to determine if it was the same bird exercising both times. I compared a picture from each series and believe it was the same bird in both sequences. There is a white semicircle below/behind the eye and also similarities in the wing feathers.
When I arrived at the pond the nest appeared empty.
I began scanning the area and found two juveniles. One was perched on a stump in the middle of the pond about 2' above the water. The other juvenile was in a dead tree at the pond's edge.
I also found an adult sitting in a dead tree further along the shore that the juvenile that was perched in the dead tree.
While watching the bird perched on the stump in the water it began looking upward and then it took off. It went toward the nest.
As I watched the juvenile prepare to land on the nest an adult with a fish land on the nest.
I saw that there were two birds in the nest, the bird I saw fly up to the nest and the adult with the fish. I didn't see the second juvenile in the nest until after the adult left the nest. I am not sure where the second juvenile came from. On previous occasions I have seen where a birds was out of sight in the nest before becoming visible after it changed position in the nest. So that is one possible answer, the bird moved so I could now see it. The other answer is that the second juvenile flew into the nest after the adult and first juvenile. I don't think that is the case because when birds come to the nest it take a bit for them to settle so I think I would have noticed a third bird fly in to the nest. Or not?
The adult left the nest and flew to a tree at the edge of the pond 200 yards from the nest where it stayed for the remainder of my time at the pond. Before landing in the tree the adult did a couple of laps around the pond well below tree top level and took the time to strafe a great blue heron that was hunting along the shore over 100 yards from the nest. The heron objected loudly. There have been herons on the shore on other occasions when the adults were present and there were not interactions between them. Did the osprey act aggressively towards the heron because the juveniles are out of the nest?
The juvenile in the dead tree and the other adult further along the shore never flew during the time I was at the pond. The juvenile did change positions and exercise its wings briefly.
The juvenile that flew up to the nest spent the entire time after arriving at the nest eating a fish. The other bird in the nest never approached the bird eating the fish. The bird with the fish moved closer to the edge away from the nest mate once it had possession of the fish. The bird in the nest that was not eating would call occasionally.
The non eating bird then left the nest and flew around the pond at low levels, never more that 30' or so above the water. On two occasions it flew low to the water and dragged its feet in the water leaving a wake. The sight was reminiscent of an eagle snatching a fish close to the surface. Is this how juveniles hunt until they perfect the prototypical osprey plunge?
At this time all three juveniles can fly, both parents are present at the pond and at least one adult is bringing food to the nest.