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.
And just like that little one is grown up and out of the nest. This morning I saw Mom with fish on her nearby telephone pole. She then went to the nest with it, but no chick. I observed the fledgling in a nearby lower tree, and the male again way across the street high in his telephone pole looking on. Will continue to monitor. Still can't read the male's band but hopefully will get lucky in the next few days.
I went by tonight just to confirm the nest is EMPTY and I see the juvenile sitting in a nearby tree, MOM is in her usual position on the pole and Dad wasn't positively identified but I believe he was sitting on a rooftop in the vicinity. Another successful nest in this area.
This afternoon I was lucky to have observed the female bringing in another fish. She landed in the nest where the single nestling was waiting. Then she left with the fish to a nearby pole where she waited for it to stop flopping and started to tear off the front of the fish. Meanwhile I saw and heard the nestling making sounds, looked up and there was the leg-banded male circling over my vehicle and looking down at me. I verified through my images that it was him with the sliver leg band on the left leg that ends in "233". Again cannot read any other numbers. He then waited on a nearby pole while the female worked on the fish. This is an interesting dynamic at this nest and I'd love to learn more about why the roles seem to be switched here. She has a prominent necklace, and the male is clearly leg banded on the left and has no necklace markings. I hope I can observe more here to figure out what is going on. Chick is going to fly any day, and I hope to catch that too. Images uploaded.
After last night's storm came through with winds up to 40mph gusts, I checked this nest to find one large nestling doing some hover practice and MOM bringing home a breakfast fish! 615am. I captured some photos of her approaching and landing in the nest with the fish - clearly the female because the male that has been observed here has a silver leg band. Impressive! Mom dropped the fish then took off to circle over the nest. Even though this nest is on a very busy avenue, I felt my presence was upsetting her so I departed the area.
Heavy thunderstorms moved through this morning. The weather cleared in the afternoon so I drove by to check on this particular nest - (3 in the immediate area) , and one large Nestling was still there and looking healthy and strong as ever. Because of the proximity to a very busy street and the lack of parking in the area, it is hard to see into the nest. Nestling looks ready to fly at any time.
Male on this nest has a silver Federal leg band ending in the numbers "233" He was perched in a high tree limb very close to the nest and was preening his tail feathers. Picture uploaded of the banded male.
Breakfast time at this nest and all is well. Mom had a fish on the nest when I arrived but she left the nest with the fish when two other Ospreys did a low flyby. It appeared one was the male and another was an intruder. An Osprey airshow ensued for a minute or two and eventually the male returned to a nearby branch and Mom carefully returned and resumed feeding the nestlings.
Observed female feeding at least one nestling. Steep angle and busy intersection so will come back when its quieter to observe more. Upon closer examination of photos, two nestlings tails are distinctly visible at this time.