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.
This nest is no longer active- drove by around 1pm this day to see workers on the tower. Osprey pair were flying nearby with nesting material, but bringing it to other nearby tower to build new nest. Pretty certain nest was removed from old tower, and/or anti-nesting measures were placed on tower. See nest #7849 (aka Porter Road #2) for 2020 season and so on.
Fledglings actively exercising their wings. Mother lifting herself off platform a few feet to encourage the fledglings to do the same. Mother did this over and over again. Fledglings didn't respond. 5% overcast with high visibility.
9:50 - 10:20 Sky overcast was 0% with high visibility. Two adults observed. One tending the nest and the second bringing food. First adult was feeding the chick(s). Second adult watched and while the feeding activity took place. Second adult observed chasing a bird away and then returning. Second adult also briefly helped in feeding the chick(s).
9:30-10:15am. 10% overcast w/high visibility. Two adults observed. One bringing food and the other tending the nest and feeding the chicks. Did not observe chicks. Assuming their are chicks present by the activity of the adult tending the nest.
Nest observed from 15:49 to 16:00 on 6/21/18. Overcast was 80% and visibility was high. Just like last survey, one adult was next to the nest. I could not get a glimpse of any possible nestlings. Adult stayed there for the duration of the survey.
Nest observed from 14:27 to 14:40 on 5/24/18. Overcast was 0% and visibility was high. It appeared as though there was no adult on the nest. One adult was perched next to it. Could possibly have chicks now.
Nest observed from 14:28 to 14:41 on 5/10/18. Overcast was 50% and visibility was high. One adult was perched next to the nest, while another was on it. The perched osprey flew to a lower level of the cell tower and began preening. Both adults remained in these spots for the duration of the survey.
Nest observed from 11:00 to 11:21 on 4/26/18. Overcast was 25% and visibility was high. Both adults were present at the nest. The female was on the nest, but flew off and quickly returned to it. The male remained nearby and would fly to deter nearby vultures from approaching. Another adult osprey came near, which the male promptly gave chase to and away from the nest.
Nest observed from 14:02 to 14:40 on 4/12/18. Overcast was 75% and visibility was high. Female osprey was at the nest, calling. Male osprey came to the nest, mated with the female, and then shortly left afterward. Not long after, the male returned with what looked to be a large goldfish or koi. The female accepted the fish and started eating it. Both adults eventually flew away, with the female going into a nearby tree to continue eating.
Nest observed from 13:08 to 13:33 on 4/10/18. Overcast was 40% and visibility was high. Nest appeared more built up, but no osprey at the nest. Two osprey were on one of the other cell towers in the area, and stayed for the duration of the survey.
Nest observed from 13:36 to 13:48 on 3/30/18. Overcast was 100% and visibility was high. Two adults were at the nest, with one directly over top of the nest. Another osprey came near, but was given chase by the two at the nest. The two original adults circled around one another after the other was gone, and eventually went out of view.
Nest observed from 13:43 to 13:55 on 3/27/18. Overcast was 100% and visibility was high. No osprey at platform, but nest material is visible. Could possibly be remnants from the previous year, but could not say for certain. Several starlings were around the edge of the platform.
Nest observed from 15:40 to 15:50 on 8/17/17. Overcast was 30% and visibility was high. One juvenile at the nest, calling constantly. It flew up onto a higher point of the tower, and remained there for the duration of the survey. No others were seen nearby.
Nest observed from 14:36 to 14:55 on 8/11/17. Overcast was 75% and visibility was high. There was only one juvenile at the nest. Another osprey flew nearby and began pursuit of a red-tailed hawk. The osprey at the nest took off, but went past the treeline. The one pursuing the hawk attacked several times, driving it away. It returned to the nest and was able to identify as another juvenile. It was calling for the rest of the survey.
Nest observed from 11:48 to 12:03 on 8/5/2017. Overcast was 30% and visibility was high. One chick was feeding while another was preening. The feeding chick then took flight, mingling with another osprey in flight nearby. It appeared to be the third juvenile- they are all capable of flight now. Judging by the prowess in flight, they have probably been flying for quite some time now, at least two weeks. The two osprey flew out of sight, and the one remaining in the nest stayed there for the rest of the survey.
Nest observed from 16:05 to 16:18 on 7/23/17. Overcast was 100% and visibility was high- it had started to lightly rain. One of the chicks was continuously flapping and looked capable of flight. Could only see 2 of the chicks, but the third may have just been out of view. Both adults returned to the nest, one of which had a fish. It left the fish and flew off again, leaving the other adult with the chicks.
Nest observed from 12:38 to 12:58 on 7/8/17. Overcast was 50% and visibility was high. There are a definitive 3 chicks at the nest, all nearing 7 weeks old. An adult was also at the nest, calling continuously. The chicks were seen with pieces of food. The adult left for a brief moment, flew in a circle near the nest, and landed back at the nest. They stayed there for the duration of the survey.
Nest observed from 14:20 to 14:35 on 6/23/17. Overcast was 70% and visibility was high. The female was at the nest, and 2 chicks were visible. They appeared roughly 4-5 weeks old. Near the end of the survey, the male came with a fish to the nest.
Nest observed from 14:23 to 14:34 on 5/31/17. Overcast was 50% and visibility was high. There were a total of 3 adults, one appeared to be feeding chicks on the nest and two were flying around the tower close by. Judging by chest markings, they appeared to be male and female. It did not seem like an aggressive interaction, but they did eventually fly out of sight from the nest. At the end of the survey, the adult at the nest went to sit on it.
Nest observed from 15:23 to 15:38 on 5/17/17. Overcast was 0% and visibility was high. The male was on the nest, while the female circled around the area nearby for a few minutes. She came to the nest and switched incubating duties with the male. Male stayed perched next to the nest for the rest of the survey.
Nest observed from 12:55 to 13:15 on 5/3/17. Overcast was 85% and visibility was high. One adult was on the nest for the entire duration of the survey. As I was leaving, another osprey was flying overhead toward the nest.
Nest observed from 15:50 to 16:00 on 4/23/17. Overcast was 70% and visibility was high. Immediately could see the nest and that it was built up, but could not see an osprey on it until it stood up. Looks to be incubating female. No other adults seen.
Nest observed from 15:10 to 15:35 on 4/1/17. Overcast was 100% and visibility was high. One adult was on the cell tower below the nest, eating a fish. It then flew up to the nest platform. Another adult flew in toward the nest, but the interaction between the two seemed hostile and the adult at the nest gave chase. Both flew off out of sight at the end of the survey.
Nest observed from 16:50 to 17:00 on 3/25/17. Overcast was 100% and visibility was high. At the time there was no presence of adults. The old nest is gone, but it may have fallen/manually been removed like it had been last year at this time.
On 8/11/16, I observed this nest from 15:30 to 15:40. Overcast was 25% and visibility was high. No adults were present, but both chicks were. One was at the nest while the other was on a nearby cell tower. Both stayed in these locations for the duration of the survey.
On 8/7/16, I observed this nest from 19:10 to 19:40. Overcast was 15% and visibility was high. The two fledglings were around the nest. Two adults flew near the nest and then landed in the other nearby cell tower. The fledglings were calling continuously at the adults, but they remained perched at cell tower for the rest of the survey.
On 7/25/16, I observed this nest from 16:00 to 16:13. Overcast was 95% and visibility was high. One adult was present on a nearby cell tower. At least one of the chicks was now a fledgling, as it was perched on a nearby spruce tree. The other chick was still on the nest. All three osprey stayed at these locations for the duration of the survey.
On 7/9/16, I observed this nest from 10:17 to 10:30. The sky was fully overcast but visibility was still high. There were no adults present, but I could see at least two chicks in the nest. They appeared to be around 6-7 weeks old. Although still in the nest, the chicks appeared as though they were becoming increasingly mobile.
On 6/30/16, I observed this nest from 15:18 to 15:28. Overcast was 35% and visibility was high. There was only one adult at the nest, but it was sitting over the nest as if to shield the chicks from the sun. It remained this way for the duration of the survey.
On 6/27/16, I observed this nest from 15:27 to 15:38. Overcast was 60% and visibility was high. One adult was standing over the nest feeding chicks. I know that there are at least two chicks judging by how the adult was feeding them. Another adult was flying around the area and near the nest, then flew off out of sight.
On 6/7/16, I observed this nest from 15:20 to 15:30. Overcast was 80% with high visibility, although it did begin to rain during the survey. One adult was at the nest, then sat on the nest once it began raining.
On 5/29/16, I observed this nest from 11:30 to 11:43. Sky overcast was 20% and visibility was high. Both of the adults were at the nest. The female was sitting on the nest, while the male perched next to her. They remained this way for the duration of the survey.
On 5/23/16, I observed this nest from 10:09 to 10:25. Sky overcast was 75% and visibility was high. When I arrived, an adult flew by to a nearby cell tower with a fish in tow. Another adult was at the tower already. The two seemed to be "spatting" at one another, but were not physically aggressive. The one without a fish flew back toward the nest, but the female refused to let it land on or near the nest by giving warning calls. The other adult with the fish (the male of the nest presumably) came back, gave it to the female, and stayed at the nest. The other adult left. The female stood over the nest and appeared to be picking at the fish and feeding chicks.
On 5/15/16, I observed this nest from 16:32 to 16:47. Visibility was high and overcast was 40%. I could not tell if an adult was on the nest due to the viewing angle, so I cannot confirm if an osprey was there or not. No adult came and tended to the nest while I observed either. It was a noticeably windy day though, so perhaps the adult was low to the nest if present.
On 4/30/16, I observed this nest from 16:08 to 16:19. Sky overcast was roughly 70% and visibility was high. The female was on the nest and did not move, so I am certain at this point that she is incubating. The male was not seen.
On 4/18/16, I observed this nest from 15:56 to 16:09. Sky overcast was 0% and visibility was high. Both of the adults were at the nest, with the female on the nest. An object that looked like a plastic bag was by the female. There was a Cooper's hawk calling nearby, but it did not disrupt the osprey pair. The male flew off near the end of the survey.
On 4/6/16, I observed this nest from 14:28 to 14:58. Sky overcast was roughly 5% and visibility was high. After arriving, an adult osprey arrived at the nest with a fish. Another adult was on the nest tending to it. The adult that brought the fish left very quickly, and it looked like it took a large rag-like object with it. The adult, which I identified as the female, flew to a nearby tree that has been a popular roosting spot for these osprey in the past. The male on the nest then left and came back shortly with a stick. Near the end of the survey, the female left her perch, without the object she originally had, and went into the nearby forest to bring another stick to the nest. She then stayed on the nest while the male stayed over it.
On 4/4/16, I observed this nest from 12:39 to 12:59. Overcast was 100% and visibility was high. Shortly after I arrived, an adult osprey flew up to the nest with a large stick in tow. Judging by size and breast color, I believe it was the female. After adding the stick to the nest, she stayed above the nest for the rest of the survey. I did not see another adult.
On 3/9/16, I observed this nest from 16:55 to 17:10. It was a relatively clear day, with high visibility and 35% overcast. There are no signs of adults yet, and it appears that the cell tower was cleared of the old nest. Was it forcibly removed?