Nest is located on island across from flathead lake yacht club. i didn't think my volunteer observer was going to report, but i was wrong!
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.
hoping this pair has moved to nest #4857 due to this nest being disturbed two years in a row. monitor thinks a bald eagle has a nest nearby, which might account for the failure, although i haven't ruled out human activity
someone reported to al that a dead osprey was found on the island where nest is located. this is the 2nd year the nest has failed. i don't like the sound of this (see oldenburg nest history). apparently cause of death was not obvious. i'm guessing this osprey belonged to the yacht club nest, which led to this year's abandonment.
on 6/5, al observed a pair of osprey building a new nest on a nearby platform! this new platform is closer to the public beach but farther from harassing eagles (which i guess are right across the channel, per AJ). too late for chicks this year, but maybe it's the same pair staking claim to a different site? lord knows the original nest has not worked for at least 2 years!
the 2nd nest of the season that i think has failed, but not sure yet. on 5/30, al observed one in the nest (i'm guessing mom) and one eating a fish in a nearby snag. mom solicited food, dad ignored her and kept eating, mom then left the nest and perched above him on the same snag for awhile, then flew across the highway and landed in a tree that she couldn't have seen the nest from. AJ observed the nest empty for almost an hour on 5/30. today i checked again, and there were no osprey around the nest for the 10 minutes i observed. this will be the 2nd year in a row this nest has failed - what is going on?
on 6/21/12, al observed both parents perched away from nest. they did not return to nest for over an hour of observation. he will go back later today to see if nest is still vacant. he believes the nest has been abandoned. a magpie has been bothering the nest all season, so it's hard to believe m/d osprey would leave the nest for such a long period of time.