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.
Nest visited by a second female while female on nest and male brining in dinner. She landed on the tower and tried to get in the nest, but was escorted away and the male soon returned with dinner. Wonder if this could be the female from the nearby new nest.
The female has been observed on the nest and is difficult to see due to the height of the nest. I believe she is sitting on eggs at this time.
Approximately 3 weeks ago 3 ospreys were observed at this nest by another person.
This is always an interesting nest! Initially it was hard to determine the number of nestlings and I thought that there might have only been one, but there were definitely 2. I believe the first fledge occurred sometime between 7/7 and 7/10, but it may have been an accidental fledge. Although I could not visually locate the fledgling, I could hear it calling from some trees and it seemed to remain in the same location for several days. The second bird fledged around 7/15. The parents and fledglings still perch at the nest tower and have been observed eating there. Some interesting interaction this week. On 7/21 a juvenile Red tailed Hawk was observed perched on the lower third of the tower and both adults ospreys were perched up by the nest. No juvenile ospreys were seen or heard, but the RTH was calling loudly and frequently. An adult and another juvenile RTH were observed on the larger tower to the east.
The ospreys have fledged and to my surprise, there are 3 fledglings! Looks like 2 males and 1 female. All perched on the tower withthe adult male, while the adult female was perched atop the tower to the east. Next year I plan to keep a spotting scope in my car. Hopefully that will help see into this high nest a bit better :-)
Again two ospreys on the antennae, one was the adult female, the other clearly a juvenile male. A police officer stopped by while I was there and noted that a "small" osprey was seen in the adjacent municipal area about 10 feet off the ground (maybe the juvenile male?) and that the ospreys are frequently seen there on top of the buildings. Aside from the two on the antennae, there were two others in the nest, one of which later flew and perched on the larger communications tower to the east by the water tower. Since I haven't personally observed a juvie in flight, I will wait to enter this as a fledge.
Not sure if both of the Ospreys on the antennae to the right of the nest are this years brood, but at least one is. The adult flying to the left took off from the nest. I didn't have my binoculars so couldn't tell who was who.
On 6/24/13 I visited the nest around 7:15 PM and found the nest being mobbed by appx 12 crows! The female was on the nest at the time and shouted her displeasure to the crows; she did not however leave the nest or her nestlings. This went on for a short time and finally the crows left. The male returned about 10 minutes later with dinner and remained perched on the tower while the female fed the nestlings. Not sure how many there are yet.
Exciting day on Wednesday 4/17. Approached the tower and noticed a red tailed hawk about halfway up the tower. This same redtail was using this tower as a perch frequently prior to the arrival of the ospreys, but haven't.seen it perched here since. The redtail took flight and climbed until it was at nest height, then swooped the nest (the female is incubating). No damage done to the RTH or the osprey, but I wonder if this has and will be an ongoing conflict. Only time will tell.